64539879 has 8 divisors (see below), whose sum is σ = 86486400. Its totient is φ = 42809976.

The previous prime is 64539869. The next prime is 64539889. The reversal of 64539879 is 97893546.

It is an interprime number because it is at equal distance from previous prime (64539869) and next prime (64539889).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64539879 - 2⁵ = 64539847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64539809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53457 + ... + 54650.

It is an arithmetic number, because the mean of its divisors is an integer number (10810800).

Almost surely, 2^64539879 is an apocalyptic number.

64539879 is a deficient number, since it is larger than the sum of its proper divisors (21946521).

64539879 is a wasteful number, since it uses less digits than its factorization.

64539879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108309.

The product of its digits is 1632960, while the sum is 51.

The square root of 64539879 is about 8033.6715765583. The cubic root of 64539879 is about 401.1216000107.

The spelling of 64539879 in words is "sixty-four million, five hundred thirty-nine thousand, eight hundred seventy-nine".