64509313 has 16 divisors (see below), whose sum is σ = 74427840. Its totient is φ = 55296000.

The previous prime is 64509307. The next prime is 64509317. The reversal of 64509313 is 31390546.

It is a cyclic number.

It is not a de Polignac number, because 64509313 - 2⁵ = 64509281 is a prime.

It is a super-2 number, since 2×64509313² = 8322902927463938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64509317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53113 + ... + 54313.

It is an arithmetic number, because the mean of its divisors is an integer number (4651740).

Almost surely, 2^64509313 is an apocalyptic number.

It is an amenable number.

64509313 is a deficient number, since it is larger than the sum of its proper divisors (9918527).

64509313 is a wasteful number, since it uses less digits than its factorization.

64509313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 64509313 is about 8031.7689832315. The cubic root of 64509313 is about 401.0582664611.

Adding to 64509313 its reverse (31390546), we get a palindrome (95899859).

The spelling of 64509313 in words is "sixty-four million, five hundred nine thousand, three hundred thirteen".