99720064 has 16 divisors (see below), whose sum is σ = 198661320. Its totient is φ = 49859968.

The previous prime is 99720031. The next prime is 99720073. The reversal of 99720064 is 46002799.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389404 + ... + 389659.

Almost surely, 2^99720064 is an apocalyptic number.

It is an amenable number.

99720064 is a deficient number, since it is larger than the sum of its proper divisors (98941256).

99720064 is an equidigital number, since it uses as much as digits as its factorization.

99720064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779077 (or 779065 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 99720064 is about 9985.9933907449. The cubic root of 99720064 is about 463.7253626452.

The spelling of 99720064 in words is "ninety-nine million, seven hundred twenty thousand, sixty-four".