64120717 has 2 divisors, whose sum is σ = 64120718. Its totient is φ = 64120716.

The previous prime is 64120691. The next prime is 64120733. The reversal of 64120717 is 71702146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54597321 + 9523396 = 7389^2 + 3086^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64120717 is a prime.

It is a super-2 number, since 2×64120717² = 8222932697188178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64120817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32060358 + 32060359.

It is an arithmetic number, because the mean of its divisors is an integer number (32060359).

Almost surely, 2^64120717 is an apocalyptic number.

It is an amenable number.

64120717 is a deficient number, since it is larger than the sum of its proper divisors (1).

64120717 is an equidigital number, since it uses as much as digits as its factorization.

64120717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 64120717 is about 8007.5412580892. The cubic root of 64120717 is about 400.2513357927.

The spelling of 64120717 in words is "sixty-four million, one hundred twenty thousand, seven hundred seventeen".