99111915 has 24 divisors (see below), whose sum is σ = 196336608. Its totient is φ = 45308160.

The previous prime is 99111907. The next prime is 99111919. The reversal of 99111915 is 51911199.

It is not a de Polignac number, because 99111915 - 2³ = 99111907 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 99111915.

It is not an unprimeable number, because it can be changed into a prime (99111919) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157006 + ... + 157635.

It is an arithmetic number, because the mean of its divisors is an integer number (8180692).

Almost surely, 2^99111915 is an apocalyptic number.

99111915 is a deficient number, since it is larger than the sum of its proper divisors (97224693).

99111915 is a wasteful number, since it uses less digits than its factorization.

99111915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314659 (or 314656 counting only the distinct ones).

The product of its digits is 3645, while the sum is 36.

The square root of 99111915 is about 9955.4967229164. The cubic root of 99111915 is about 462.7807538137.

The spelling of 99111915 in words is "ninety-nine million, one hundred eleven thousand, nine hundred fifteen".