64571879 has 4 divisors (see below), whose sum is σ = 67379376. Its totient is φ = 61764384.

The previous prime is 64571869. The next prime is 64571887. The reversal of 64571879 is 97817546.

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

It is not a de Polignac number, because 64571879 - 2⁴ = 64571863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64571839) 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, 1403714 + ... + 1403759.

It is an arithmetic number, because the mean of its divisors is an integer number (16844844).

Almost surely, 2^64571879 is an apocalyptic number.

64571879 is a deficient number, since it is larger than the sum of its proper divisors (2807497).

64571879 is a wasteful number, since it uses less digits than its factorization.

64571879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807496.

The product of its digits is 423360, while the sum is 47.

The square root of 64571879 is about 8035.6629471376. The cubic root of 64571879 is about 401.1878834237.

The spelling of 64571879 in words is "sixty-four million, five hundred seventy-one thousand, eight hundred seventy-nine".