656501137 has 2 divisors, whose sum is σ = 656501138. Its totient is φ = 656501136.

The previous prime is 656501063. The next prime is 656501203. The reversal of 656501137 is 731105656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 655411201 + 1089936 = 25601^2 + 1044^2 .

It is a cyclic number.

It is not a de Polignac number, because 656501137 - 2¹¹ = 656499089 is a prime.

It is not a weakly prime, because it can be changed into another prime (656501837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328250568 + 328250569.

It is an arithmetic number, because the mean of its divisors is an integer number (328250569).

Almost surely, 2^656501137 is an apocalyptic number.

It is an amenable number.

656501137 is a deficient number, since it is larger than the sum of its proper divisors (1).

656501137 is an equidigital number, since it uses as much as digits as its factorization.

656501137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 656501137 is about 25622.2781383701. The cubic root of 656501137 is about 869.1174990084.

The spelling of 656501137 in words is "six hundred fifty-six million, five hundred one thousand, one hundred thirty-seven".