64579939 has 2 divisors, whose sum is σ = 64579940. Its totient is φ = 64579938.

The previous prime is 64579919. The next prime is 64579969. The reversal of 64579939 is 93997546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64579939 - 2²⁵ = 31025507 is a prime.

It is not a weakly prime, because it can be changed into another prime (64579919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32289969 + 32289970.

It is an arithmetic number, because the mean of its divisors is an integer number (32289970).

Almost surely, 2^64579939 is an apocalyptic number.

64579939 is a deficient number, since it is larger than the sum of its proper divisors (1).

64579939 is an equidigital number, since it uses as much as digits as its factorization.

64579939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1837080, while the sum is 52.

The square root of 64579939 is about 8036.1644458037. The cubic root of 64579939 is about 401.2045751057.

The spelling of 64579939 in words is "sixty-four million, five hundred seventy-nine thousand, nine hundred thirty-nine".