64922979 has 16 divisors (see below), whose sum is σ = 94667904. Its totient is φ = 39249600.

The previous prime is 64922947. The next prime is 64922987. The reversal of 64922979 is 97922946.

It is not a de Polignac number, because 64922979 - 2⁵ = 64922947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64922929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12399 + ... + 16839.

It is an arithmetic number, because the mean of its divisors is an integer number (5916744).

Almost surely, 2^64922979 is an apocalyptic number.

64922979 is a deficient number, since it is larger than the sum of its proper divisors (29744925).

64922979 is a wasteful number, since it uses less digits than its factorization.

64922979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4898.

The product of its digits is 489888, while the sum is 48.

The square root of 64922979 is about 8057.4796928072. The cubic root of 64922979 is about 401.9137026709.

The spelling of 64922979 in words is "sixty-four million, nine hundred twenty-two thousand, nine hundred seventy-nine".