64312637 has 2 divisors, whose sum is σ = 64312638. Its totient is φ = 64312636.

The previous prime is 64312627. The next prime is 64312639. The reversal of 64312637 is 73621346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51681721 + 12630916 = 7189^2 + 3554^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64312637 is a prime.

It is a super-2 number, since 2×64312637² = 8272230555787538, which contains 22 as substring.

Together with 64312639, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64312639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32156318 + 32156319.

It is an arithmetic number, because the mean of its divisors is an integer number (32156319).

Almost surely, 2^64312637 is an apocalyptic number.

It is an amenable number.

64312637 is a deficient number, since it is larger than the sum of its proper divisors (1).

64312637 is an equidigital number, since it uses as much as digits as its factorization.

64312637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 32.

The square root of 64312637 is about 8019.5160078399. The cubic root of 64312637 is about 400.6502693848.

The spelling of 64312637 in words is "sixty-four million, three hundred twelve thousand, six hundred thirty-seven".