64957239 has 12 divisors (see below), whose sum is σ = 94705416. Its totient is φ = 42899472.

The previous prime is 64957223. The next prime is 64957247. The reversal of 64957239 is 93275946.

It is a happy number.

64957239 is a `hidden beast` number, since 6 + 49 + 572 + 39 = 666.

It is not a de Polignac number, because 64957239 - 2⁴ = 64957223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64957194 and 64957203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64957439) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32764 + ... + 34689.

It is an arithmetic number, because the mean of its divisors is an integer number (7892118).

Almost surely, 2^64957239 is an apocalyptic number.

64957239 is a deficient number, since it is larger than the sum of its proper divisors (29748177).

64957239 is a wasteful number, since it uses less digits than its factorization.

64957239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67566 (or 67563 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 64957239 is about 8059.6053873623. The cubic root of 64957239 is about 401.9843871563.

The spelling of 64957239 in words is "sixty-four million, nine hundred fifty-seven thousand, two hundred thirty-nine".