64465939 has 2 divisors, whose sum is σ = 64465940. Its totient is φ = 64465938.

The previous prime is 64465931. The next prime is 64465943. The reversal of 64465939 is 93956446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64465939 - 2³ = 64465931 is a prime.

It is not a weakly prime, because it can be changed into another prime (64465931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32232969 + 32232970.

It is an arithmetic number, because the mean of its divisors is an integer number (32232970).

Almost surely, 2^64465939 is an apocalyptic number.

64465939 is a deficient number, since it is larger than the sum of its proper divisors (1).

64465939 is an equidigital number, since it uses as much as digits as its factorization.

64465939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 46.

The square root of 64465939 is about 8029.0683768417. The cubic root of 64465939 is about 400.9683600552.

The spelling of 64465939 in words is "sixty-four million, four hundred sixty-five thousand, nine hundred thirty-nine".