64959139 has 4 divisors (see below), whose sum is σ = 74239024. Its totient is φ = 55679256.

The previous prime is 64959133. The next prime is 64959163. The reversal of 64959139 is 93195946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93195946 = 2 ⋅46597973.

It is a cyclic number.

It is not a de Polignac number, because 64959139 - 2¹¹ = 64957091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64959133) 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, 4639932 + ... + 4639945.

It is an arithmetic number, because the mean of its divisors is an integer number (18559756).

Almost surely, 2^64959139 is an apocalyptic number.

64959139 is a deficient number, since it is larger than the sum of its proper divisors (9279885).

64959139 is an equidigital number, since it uses as much as digits as its factorization.

64959139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9279884.

The product of its digits is 262440, while the sum is 46.

The square root of 64959139 is about 8059.7232582763. The cubic root of 64959139 is about 401.9883064674.

The spelling of 64959139 in words is "sixty-four million, nine hundred fifty-nine thousand, one hundred thirty-nine".