656063923 has 2 divisors, whose sum is σ = 656063924. Its totient is φ = 656063922.

The previous prime is 656063899. The next prime is 656063957. The reversal of 656063923 is 329360656.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-656063923 is a prime.

It is not a weakly prime, because it can be changed into another prime (656003923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328031961 + 328031962.

It is an arithmetic number, because the mean of its divisors is an integer number (328031962).

Almost surely, 2^656063923 is an apocalyptic number.

656063923 is a deficient number, since it is larger than the sum of its proper divisors (1).

656063923 is an equidigital number, since it uses as much as digits as its factorization.

656063923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 40.

The square root of 656063923 is about 25613.7448062559. The cubic root of 656063923 is about 868.9245190308.

The spelling of 656063923 in words is "six hundred fifty-six million, sixty-three thousand, nine hundred twenty-three".