8998561 has 8 divisors (see below), whose sum is σ = 10571904. Its totient is φ = 7551120.

The previous prime is 8998553. The next prime is 8998579. The reversal of 8998561 is 1658998.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8998561 - 2³ = 8998553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8998061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31321 + ... + 31606.

It is an arithmetic number, because the mean of its divisors is an integer number (1321488).

Almost surely, 2^8998561 is an apocalyptic number.

It is an amenable number.

8998561 is a deficient number, since it is larger than the sum of its proper divisors (1573343).

8998561 is a wasteful number, since it uses less digits than its factorization.

8998561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62951.

The product of its digits is 155520, while the sum is 46.

The square root of 8998561 is about 2999.7601570792. The cubic root of 8998561 is about 207.9972956379.

It can be divided in two parts, 8998 and 561, that added together give a palindrome (9559).

The spelling of 8998561 in words is "eight million, nine hundred ninety-eight thousand, five hundred sixty-one".