64939753 has 4 divisors (see below), whose sum is σ = 65353540. Its totient is φ = 64525968.

The previous prime is 64939751. The next prime is 64939769. The reversal of 64939753 is 35793946.

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 40615129 + 24324624 = 6373^2 + 4932^2 .

It is a cyclic number.

It is not a de Polignac number, because 64939753 - 2¹ = 64939751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64939751) 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, 206658 + ... + 206971.

It is an arithmetic number, because the mean of its divisors is an integer number (16338385).

Almost surely, 2^64939753 is an apocalyptic number.

It is an amenable number.

64939753 is a deficient number, since it is larger than the sum of its proper divisors (413787).

64939753 is a wasteful number, since it uses less digits than its factorization.

64939753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413786.

The product of its digits is 612360, while the sum is 46.

The square root of 64939753 is about 8058.5205217831. The cubic root of 64939753 is about 401.9483135284.

The spelling of 64939753 in words is "sixty-four million, nine hundred thirty-nine thousand, seven hundred fifty-three".