656464073 has 2 divisors, whose sum is σ = 656464074. Its totient is φ = 656464072.

The previous prime is 656464069. The next prime is 656464093. The reversal of 656464073 is 370464656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 626400784 + 30063289 = 25028^2 + 5483^2 .

It is a cyclic number.

It is not a de Polignac number, because 656464073 - 2² = 656464069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 656464073.

It is not a weakly prime, because it can be changed into another prime (656464033) 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, 328232036 + 328232037.

It is an arithmetic number, because the mean of its divisors is an integer number (328232037).

Almost surely, 2^656464073 is an apocalyptic number.

It is an amenable number.

656464073 is a deficient number, since it is larger than the sum of its proper divisors (1).

656464073 is an equidigital number, since it uses as much as digits as its factorization.

656464073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 41.

The square root of 656464073 is about 25621.5548513356. The cubic root of 656464073 is about 869.1011428158.

The spelling of 656464073 in words is "six hundred fifty-six million, four hundred sixty-four thousand, seventy-three".