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BaseRepresentation
bin100110001001…
…001010010111
3200211000001022
4212021022113
510024431444
6554151355
7150663413
oct46111227
920730038
109998999
11570a43a
12342255b
1320c128a
141483d43
15d279ee
hex989297

9998999 has 4 divisors (see below), whose sum is σ = 10036440. Its totient is φ = 9961560.

The previous prime is 9998977. The next prime is 9999047.

9998999 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9998999 - 28 = 9998743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9998929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18317 + ... + 18854.

It is an arithmetic number, because the mean of its divisors is an integer number (2509110).

Almost surely, 29998999 is an apocalyptic number.

9998999 is a deficient number, since it is larger than the sum of its proper divisors (37441).

9998999 is a wasteful number, since it uses less digits than its factorization.

9998999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37440.

The product of its digits is 4251528, while the sum is 62.

The square root of 9998999 is about 3162.1193842105. The cubic root of 9998999 is about 215.4362801329.

The spelling of 9998999 in words is "nine million, nine hundred ninety-eight thousand, nine hundred ninety-nine".

Divisors: 1 269 37171 9998999