64983931 has 2 divisors, whose sum is σ = 64983932. Its totient is φ = 64983930.

The previous prime is 64983917. The next prime is 64983949. The reversal of 64983931 is 13938946.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64983931 - 2⁹ = 64983419 is a prime.

It is a super-2 number, since 2×64983931² = 8445822576425522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64983031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32491965 + 32491966.

It is an arithmetic number, because the mean of its divisors is an integer number (32491966).

Almost surely, 2^64983931 is an apocalyptic number.

64983931 is a deficient number, since it is larger than the sum of its proper divisors (1).

64983931 is an equidigital number, since it uses as much as digits as its factorization.

64983931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 43.

The square root of 64983931 is about 8061.2611296248. The cubic root of 64983931 is about 402.0394402861.

The spelling of 64983931 in words is "sixty-four million, nine hundred eighty-three thousand, nine hundred thirty-one".