64287313 has 4 divisors (see below), whose sum is σ = 64646640. Its totient is φ = 63927988.

The previous prime is 64287299. The next prime is 64287329. The reversal of 64287313 is 31378246.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31378246 = 2 ⋅15689123.

It is a cyclic number.

It is not a de Polignac number, because 64287313 - 2⁹ = 64286801 is a prime.

It is a super-2 number, since 2×64287313² = 8265717225519938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64287343) 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, 179395 + ... + 179752.

It is an arithmetic number, because the mean of its divisors is an integer number (16161660).

Almost surely, 2^64287313 is an apocalyptic number.

It is an amenable number.

64287313 is a deficient number, since it is larger than the sum of its proper divisors (359327).

64287313 is a wasteful number, since it uses less digits than its factorization.

64287313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359326.

The product of its digits is 24192, while the sum is 34.

The square root of 64287313 is about 8017.9369541048. The cubic root of 64287313 is about 400.5976752659.

The spelling of 64287313 in words is "sixty-four million, two hundred eighty-seven thousand, three hundred thirteen".