64703657 has 2 divisors, whose sum is σ = 64703658. Its totient is φ = 64703656.

The previous prime is 64703641. The next prime is 64703659. The reversal of 64703657 is 75630746.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61089856 + 3613801 = 7816^2 + 1901^2 .

It is a cyclic number.

It is not a de Polignac number, because 64703657 - 2⁴ = 64703641 is a prime.

Together with 64703659, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64703657.

It is not a weakly prime, because it can be changed into another prime (64703659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32351828 + 32351829.

It is an arithmetic number, because the mean of its divisors is an integer number (32351829).

Almost surely, 2^64703657 is an apocalyptic number.

It is an amenable number.

64703657 is a deficient number, since it is larger than the sum of its proper divisors (1).

64703657 is an equidigital number, since it uses as much as digits as its factorization.

64703657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 38.

The square root of 64703657 is about 8043.8583403737. The cubic root of 64703657 is about 401.4606121221.

The spelling of 64703657 in words is "sixty-four million, seven hundred three thousand, six hundred fifty-seven".