99909960 has 32 divisors (see below), whose sum is σ = 299730240. Its totient is φ = 26642624.

The previous prime is 99909947. The next prime is 99909973. The reversal of 99909960 is 6990999.

It is an interprime number because it is at equal distance from previous prime (99909947) and next prime (99909973).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416172 + ... + 416411.

It is an arithmetic number, because the mean of its divisors is an integer number (9366570).

Almost surely, 2^99909960 is an apocalyptic number.

It is an amenable number.

99909960 is an abundant number, since it is smaller than the sum of its proper divisors (199820280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99909960 is a wasteful number, since it uses less digits than its factorization.

99909960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832597 (or 832593 counting only the distinct ones).

The product of its (nonzero) digits is 354294, while the sum is 51.

The square root of 99909960 is about 9995.4969861433. The cubic root of 99909960 is about 464.0195319761.

The spelling of 99909960 in words is "ninety-nine million, nine hundred nine thousand, nine hundred sixty".