99999964 has 24 divisors (see below), whose sum is σ = 184947840. Its totient is φ = 47178864.

The previous prime is 99999959. The next prime is 99999971. The reversal of 99999964 is 46999999.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 99999896 and 99999905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17487 + ... + 22489.

It is an arithmetic number, because the mean of its divisors is an integer number (7706160).

Almost surely, 2^99999964 is an apocalyptic number.

It is an amenable number.

99999964 is a deficient number, since it is larger than the sum of its proper divisors (84947876).

99999964 is a wasteful number, since it uses less digits than its factorization.

99999964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5289 (or 5287 counting only the distinct ones).

The product of its digits is 12754584, while the sum is 64.

The square root of 99999964 is about 9999.9981999998. The cubic root of 99999964 is about 464.1588276622.

It can be divided in two parts, 9999996 and 4, that added together give a 7-th power (10000000 = 10⁷).

The spelling of 99999964 in words is "ninety-nine million, nine hundred ninety-nine thousand, nine hundred sixty-four".