64039979 has 2 divisors, whose sum is σ = 64039980. Its totient is φ = 64039978.

The previous prime is 64039951. The next prime is 64039999. The reversal of 64039979 is 97993046.

64039979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64039979 - 2¹² = 64035883 is a prime.

It is a super-2 number, since 2×64039979² = 8202237820640882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64039919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32019989 + 32019990.

It is an arithmetic number, because the mean of its divisors is an integer number (32019990).

Almost surely, 2^64039979 is an apocalyptic number.

64039979 is a deficient number, since it is larger than the sum of its proper divisors (1).

64039979 is an equidigital number, since it uses as much as digits as its factorization.

64039979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 367416, while the sum is 47.

The square root of 64039979 is about 8002.4982974069. The cubic root of 64039979 is about 400.0832722465.

The spelling of 64039979 in words is "sixty-four million, thirty-nine thousand, nine hundred seventy-nine".