64951979 has 12 divisors (see below), whose sum is σ = 67647264. Its totient is φ = 62335152.

The previous prime is 64951961. The next prime is 64951987. The reversal of 64951979 is 97915946.

It is not a de Polignac number, because 64951979 - 2¹⁶ = 64886443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64954979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163409 + ... + 163805.

It is an arithmetic number, because the mean of its divisors is an integer number (5637272).

Almost surely, 2^64951979 is an apocalyptic number.

64951979 is a deficient number, since it is larger than the sum of its proper divisors (2695285).

64951979 is an equidigital number, since it uses as much as digits as its factorization.

64951979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562 (or 503 counting only the distinct ones).

The product of its digits is 612360, while the sum is 50.

The square root of 64951979 is about 8059.2790620502. The cubic root of 64951979 is about 401.9735364542.

The spelling of 64951979 in words is "sixty-four million, nine hundred fifty-one thousand, nine hundred seventy-nine".