64565713 has 4 divisors (see below), whose sum is σ = 65783988. Its totient is φ = 63347440.

The previous prime is 64565671. The next prime is 64565719. The reversal of 64565713 is 31756546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31756546 = 2 ⋅15878273.

It can be written as a sum of positive squares in 2 ways, for example, as 35319249 + 29246464 = 5943^2 + 5408^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64565713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64565719) 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, 609058 + ... + 609163.

It is an arithmetic number, because the mean of its divisors is an integer number (16445997).

Almost surely, 2^64565713 is an apocalyptic number.

It is an amenable number.

64565713 is a deficient number, since it is larger than the sum of its proper divisors (1218275).

64565713 is a wasteful number, since it uses less digits than its factorization.

64565713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218274.

The product of its digits is 75600, while the sum is 37.

The square root of 64565713 is about 8035.2792733047. The cubic root of 64565713 is about 401.1751131421.

The spelling of 64565713 in words is "sixty-four million, five hundred sixty-five thousand, seven hundred thirteen".