64785997 has 12 divisors (see below), whose sum is σ = 69120436. Its totient is φ = 60710400.

The previous prime is 64785989. The next prime is 64786013. The reversal of 64785997 is 79958746.

It can be written as a sum of positive squares in 6 ways, for example, as 15139881 + 49646116 = 3891^2 + 7046^2 .

It is not a de Polignac number, because 64785997 - 2³ = 64785989 is a prime.

Its product of digits (3810240) is a multiple of the sum of its prime factors (1008).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64785937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107497 + ... + 108097.

Almost surely, 2^64785997 is an apocalyptic number.

It is an amenable number.

64785997 is a deficient number, since it is larger than the sum of its proper divisors (4334439).

64785997 is a wasteful number, since it uses less digits than its factorization.

64785997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008 (or 991 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 55.

The square root of 64785997 is about 8048.9749036756. The cubic root of 64785997 is about 401.6308356514.

The spelling of 64785997 in words is "sixty-four million, seven hundred eighty-five thousand, nine hundred ninety-seven".