64917379 has 4 divisors (see below), whose sum is σ = 67011520. Its totient is φ = 62823240.

The previous prime is 64917361. The next prime is 64917389. The reversal of 64917379 is 97371946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64917379 - 2²¹ = 62820227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64917329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047024 + ... + 1047085.

It is an arithmetic number, because the mean of its divisors is an integer number (16752880).

Almost surely, 2^64917379 is an apocalyptic number.

64917379 is a deficient number, since it is larger than the sum of its proper divisors (2094141).

64917379 is a wasteful number, since it uses less digits than its factorization.

64917379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094140.

The product of its digits is 285768, while the sum is 46.

The square root of 64917379 is about 8057.1321821105. The cubic root of 64917379 is about 401.9021465086.

The spelling of 64917379 in words is "sixty-four million, nine hundred seventeen thousand, three hundred seventy-nine".