999999964 has 6 divisors (see below), whose sum is σ = 1749999944. Its totient is φ = 499999980.

The previous prime is 999999937. The next prime is 1000000007. The reversal of 999999964 is 469999999.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124999992 + ... + 124999999.

Almost surely, 2^999999964 is an apocalyptic number.

It is an amenable number.

999999964 is a deficient number, since it is larger than the sum of its proper divisors (749999980).

999999964 is a wasteful number, since it uses less digits than its factorization.

999999964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249999995 (or 249999993 counting only the distinct ones).

The product of its digits is 114791256, while the sum is 73.

The square root of 999999964 is about 31622.7760324738. The cubic root of 999999964 is about 999.9999880000. Note that the first 4 decimals are identical.

It can be divided in two parts, 99999996 and 4, that added together give a 8-th power (100000000 = 10⁸).

The spelling of 999999964 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred sixty-four".