64791313 has 8 divisors (see below), whose sum is σ = 65303208. Its totient is φ = 64281984.

The previous prime is 64791269. The next prime is 64791319. The reversal of 64791313 is 31319746.

64791313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8661249 + 56130064 = 2943^2 + 7492^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64791313 - 2⁹ = 64790801 is a prime.

It is a super-4 number, since 4×64791313⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64791319) 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 7 ways as a sum of consecutive naturals, for example, 98895 + ... + 99547.

It is an arithmetic number, because the mean of its divisors is an integer number (8162901).

Almost surely, 2^64791313 is an apocalyptic number.

It is an amenable number.

64791313 is a deficient number, since it is larger than the sum of its proper divisors (511895).

64791313 is a wasteful number, since it uses less digits than its factorization.

64791313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283.

The product of its digits is 13608, while the sum is 34.

The square root of 64791313 is about 8049.3051252888. The cubic root of 64791313 is about 401.6418205927.

The spelling of 64791313 in words is "sixty-four million, seven hundred ninety-one thousand, three hundred thirteen".