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998914561 = 8161122401
BaseRepresentation
bin111011100010100…
…011101000000001
32120121122010011121
4323202203220001
54021210231221
6243042112241
733516430231
oct7342435001
92517563147
10998914561
11472952327
1223a64b681
1312bc4a108
1496947cc1
155ca69a41
hex3b8a3a01

998914561 has 4 divisors (see below), whose sum is σ = 999045124. Its totient is φ = 998784000.

The previous prime is 998914523. The next prime is 998914583. The reversal of 998914561 is 165419899.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165419899 = 263628973.

It can be written as a sum of positive squares in 2 ways, for example, as 189227536 + 809687025 = 13756^2 + 28455^2 .

It is a 3-Lehmer number, since φ(998914561) divides (998914561-1)3.

It is a cyclic number.

It is not a de Polignac number, because 998914561 - 211 = 998912513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 998914499 and 998914508.

It is not an unprimeable number, because it can be changed into a prime (998914061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53040 + ... + 69361.

It is an arithmetic number, because the mean of its divisors is an integer number (249761281).

Almost surely, 2998914561 is an apocalyptic number.

It is an amenable number.

998914561 is a deficient number, since it is larger than the sum of its proper divisors (130563).

998914561 is a wasteful number, since it uses less digits than its factorization.

998914561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130562.

The product of its digits is 699840, while the sum is 52.

The square root of 998914561 is about 31605.6096444919. The cubic root of 998914561 is about 999.6380560124.

The spelling of 998914561 in words is "nine hundred ninety-eight million, nine hundred fourteen thousand, five hundred sixty-one".

Divisors: 1 8161 122401 998914561