64957 has 4 divisors (see below), whose sum is σ = 68796. Its totient is φ = 61120.

The previous prime is 64951. The next prime is 64969. The reversal of 64957 is 75946.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54756 + 10201 = 234^2 + 101^2 .

It is a cyclic number.

It is not a de Polignac number, because 64957 - 2¹⁵ = 32189 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 (64951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1894 + ... + 1927.

It is an arithmetic number, because the mean of its divisors is an integer number (17199).

2⁶⁴⁹⁵⁷ is an apocalyptic number.

It is an amenable number.

64957 is a deficient number, since it is larger than the sum of its proper divisors (3839).

64957 is a wasteful number, since it uses less digits than its factorization.

64957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3838.

The product of its digits is 7560, while the sum is 31.

The square root of 64957 is about 254.8666317900. The cubic root of 64957 is about 40.1983894143.

The spelling of 64957 in words is "sixty-four thousand, nine hundred fifty-seven".