64565313 has 4 divisors (see below), whose sum is σ = 86087088. Its totient is φ = 43043540.

The previous prime is 64565309. The next prime is 64565323. The reversal of 64565313 is 31356546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64565313 - 2² = 64565309 is a prime.

It is a super-3 number, since 3×64565313³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64565323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10760883 + ... + 10760888.

It is an arithmetic number, because the mean of its divisors is an integer number (21521772).

Almost surely, 2^64565313 is an apocalyptic number.

It is an amenable number.

64565313 is a deficient number, since it is larger than the sum of its proper divisors (21521775).

64565313 is a wasteful number, since it uses less digits than its factorization.

64565313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21521774.

The product of its digits is 32400, while the sum is 33.

The square root of 64565313 is about 8035.2543830298. The cubic root of 64565313 is about 401.1742846819.

The spelling of 64565313 in words is "sixty-four million, five hundred sixty-five thousand, three hundred thirteen".