64642313 has 8 divisors (see below), whose sum is σ = 72047520. Its totient is φ = 57637440.

The previous prime is 64642307. The next prime is 64642321. The reversal of 64642313 is 31324646.

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 64642313 - 2⁴ = 64642297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64642013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99743 + ... + 100388.

It is an arithmetic number, because the mean of its divisors is an integer number (9005940).

Almost surely, 2^64642313 is an apocalyptic number.

It is an amenable number.

64642313 is a deficient number, since it is larger than the sum of its proper divisors (7405207).

64642313 is a wasteful number, since it uses less digits than its factorization.

64642313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200167.

The product of its digits is 10368, while the sum is 29.

The square root of 64642313 is about 8040.0443406738. The cubic root of 64642313 is about 401.3337002501. Note that the first 3 decimals are identical.

Adding to 64642313 its reverse (31324646), we get a palindrome (95966959).

The spelling of 64642313 in words is "sixty-four million, six hundred forty-two thousand, three hundred thirteen".