656912953 has 2 divisors, whose sum is σ = 656912954. Its totient is φ = 656912952.

The previous prime is 656912951. The next prime is 656912969. The reversal of 656912953 is 359219656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 633176569 + 23736384 = 25163^2 + 4872^2 .

656912953 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 656912953 - 2¹ = 656912951 is a prime.

Together with 656912951, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (656912951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328456476 + 328456477.

It is an arithmetic number, because the mean of its divisors is an integer number (328456477).

Almost surely, 2^656912953 is an apocalyptic number.

It is an amenable number.

656912953 is a deficient number, since it is larger than the sum of its proper divisors (1).

656912953 is an equidigital number, since it uses as much as digits as its factorization.

656912953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 437400, while the sum is 46.

The square root of 656912953 is about 25630.3131662491. The cubic root of 656912953 is about 869.2991903307.

It can be divided in two parts, 65691 and 2953, that added together give a square (68644 = 262²).

The spelling of 656912953 in words is "six hundred fifty-six million, nine hundred twelve thousand, nine hundred fifty-three".