64117657 has 2 divisors, whose sum is σ = 64117658. Its totient is φ = 64117656.

The previous prime is 64117631. The next prime is 64117663. The reversal of 64117657 is 75671146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63027721 + 1089936 = 7939^2 + 1044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64117657 is a prime.

It is a super-2 number, since 2×64117657² = 8222147878339298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64117607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32058828 + 32058829.

It is an arithmetic number, because the mean of its divisors is an integer number (32058829).

Almost surely, 2^64117657 is an apocalyptic number.

It is an amenable number.

64117657 is a deficient number, since it is larger than the sum of its proper divisors (1).

64117657 is an equidigital number, since it uses as much as digits as its factorization.

64117657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 64117657 is about 8007.3501859229. The cubic root of 64117657 is about 400.2449686952.

The spelling of 64117657 in words is "sixty-four million, one hundred seventeen thousand, six hundred fifty-seven".