99572865 has 32 divisors (see below), whose sum is σ = 189997056. Its totient is φ = 43538880.

The previous prime is 99572861. The next prime is 99572903. The reversal of 99572865 is 56827599.

It is a happy number.

It is not a de Polignac number, because 99572865 - 2² = 99572861 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99572861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18201 + ... + 23030.

It is an arithmetic number, because the mean of its divisors is an integer number (5937408).

Almost surely, 2^99572865 is an apocalyptic number.

It is an amenable number.

99572865 is a deficient number, since it is larger than the sum of its proper divisors (90424191).

99572865 is a wasteful number, since it uses less digits than its factorization.

99572865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41269.

The product of its digits is 1360800, while the sum is 51.

The square root of 99572865 is about 9978.6203956258. The cubic root of 99572865 is about 463.4970785161.

The spelling of 99572865 in words is "ninety-nine million, five hundred seventy-two thousand, eight hundred sixty-five".