99509907 has 16 divisors (see below), whose sum is σ = 156526592. Its totient is φ = 55028160.

The previous prime is 99509903. The next prime is 99509929. The reversal of 99509907 is 70990599.

It is not a de Polignac number, because 99509907 - 2² = 99509903 is a prime.

It is a super-2 number, since 2×99509907² = 19804443182297298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99509903) 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, 75778 + ... + 77079.

It is an arithmetic number, because the mean of its divisors is an integer number (9782912).

Almost surely, 2^99509907 is an apocalyptic number.

99509907 is a deficient number, since it is larger than the sum of its proper divisors (57016685).

99509907 is a wasteful number, since it uses less digits than its factorization.

99509907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152898.

The product of its (nonzero) digits is 229635, while the sum is 48.

The square root of 99509907 is about 9975.4652523078. The cubic root of 99509907 is about 463.3993711692.

The spelling of 99509907 in words is "ninety-nine million, five hundred nine thousand, nine hundred seven".