99930561 has 16 divisors (see below), whose sum is σ = 139413120. Its totient is φ = 63550080.

The previous prime is 99930529. The next prime is 99930563. The reversal of 99930561 is 16503999.

It is not a de Polignac number, because 99930561 - 2⁵ = 99930529 is a prime.

It is a super-2 number, since 2×99930561² = 19972234043549442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99930563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26451 + ... + 29991.

It is an arithmetic number, because the mean of its divisors is an integer number (8713320).

Almost surely, 2^99930561 is an apocalyptic number.

It is an amenable number.

99930561 is a deficient number, since it is larger than the sum of its proper divisors (39482559).

99930561 is a wasteful number, since it uses less digits than its factorization.

99930561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3976.

The product of its (nonzero) digits is 65610, while the sum is 42.

The square root of 99930561 is about 9996.5274470688. The cubic root of 99930561 is about 464.0514227219.

The spelling of 99930561 in words is "ninety-nine million, nine hundred thirty thousand, five hundred sixty-one".