73997564 has 12 divisors (see below), whose sum is σ = 131691000. Its totient is φ = 36371568.

The previous prime is 73997563. The next prime is 73997611. The reversal of 73997564 is 46579937.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73997563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156539 + ... + 157010.

It is an arithmetic number, because the mean of its divisors is an integer number (10974250).

Almost surely, 2^73997564 is an apocalyptic number.

It is an amenable number.

73997564 is a deficient number, since it is larger than the sum of its proper divisors (57693436).

73997564 is a wasteful number, since it uses less digits than its factorization.

73997564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313612 (or 313610 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 50.

The square root of 73997564 is about 8602.1836762534. The cubic root of 73997564 is about 419.8290385070.

The spelling of 73997564 in words is "seventy-three million, nine hundred ninety-seven thousand, five hundred sixty-four".