64864757 has 2 divisors, whose sum is σ = 64864758. Its totient is φ = 64864756.

The previous prime is 64864753. The next prime is 64864759. The reversal of 64864757 is 75746846.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52432081 + 12432676 = 7241^2 + 3526^2 .

It is a cyclic number.

It is not a de Polignac number, because 64864757 - 2² = 64864753 is a prime.

Together with 64864759, 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 (64864753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32432378 + 32432379.

It is an arithmetic number, because the mean of its divisors is an integer number (32432379).

Almost surely, 2^64864757 is an apocalyptic number.

It is an amenable number.

64864757 is a deficient number, since it is larger than the sum of its proper divisors (1).

64864757 is an equidigital number, since it uses as much as digits as its factorization.

64864757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 47.

The square root of 64864757 is about 8053.8659661060. The cubic root of 64864757 is about 401.7935232499.

The spelling of 64864757 in words is "sixty-four million, eight hundred sixty-four thousand, seven hundred fifty-seven".