64636983 has 6 divisors (see below), whose sum is σ = 93364544. Its totient is φ = 43091316.

The previous prime is 64636963. The next prime is 64637021. The reversal of 64636983 is 38963646.

64636983 is a `hidden beast` number, since 6 + 4 + 636 + 9 + 8 + 3 = 666.

It is not a de Polignac number, because 64636983 - 2¹⁸ = 64374839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64636933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3590935 + ... + 3590952.

Almost surely, 2^64636983 is an apocalyptic number.

64636983 is a deficient number, since it is larger than the sum of its proper divisors (28727561).

64636983 is a wasteful number, since it uses less digits than its factorization.

64636983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7181893 (or 7181890 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 64636983 is about 8039.7128680072. The cubic root of 64636983 is about 401.3226694597.

The spelling of 64636983 in words is "sixty-four million, six hundred thirty-six thousand, nine hundred eighty-three".