64307939 has 2 divisors, whose sum is σ = 64307940. Its totient is φ = 64307938.

The previous prime is 64307911. The next prime is 64307941. The reversal of 64307939 is 93970346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64307939 - 2¹⁶ = 64242403 is a prime.

It is a super-2 number, since 2×64307939² = 8271022036855442, which contains 22 as substring.

Together with 64307941, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64307896 and 64307905.

It is not a weakly prime, because it can be changed into another prime (64307909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32153969 + 32153970.

It is an arithmetic number, because the mean of its divisors is an integer number (32153970).

Almost surely, 2^64307939 is an apocalyptic number.

64307939 is a deficient number, since it is larger than the sum of its proper divisors (1).

64307939 is an equidigital number, since it uses as much as digits as its factorization.

64307939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 41.

The square root of 64307939 is about 8019.2230920458. The cubic root of 64307939 is about 400.6405133924.

The spelling of 64307939 in words is "sixty-four million, three hundred seven thousand, nine hundred thirty-nine".