656913563 has 2 divisors, whose sum is σ = 656913564. Its totient is φ = 656913562.

The previous prime is 656913547. The next prime is 656913589. The reversal of 656913563 is 365319656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656913563 - 2⁴ = 656913547 is a prime.

It is not a weakly prime, because it can be changed into another prime (656913863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328456781 + 328456782.

It is an arithmetic number, because the mean of its divisors is an integer number (328456782).

Almost surely, 2^656913563 is an apocalyptic number.

656913563 is a deficient number, since it is larger than the sum of its proper divisors (1).

656913563 is an equidigital number, since it uses as much as digits as its factorization.

656913563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 437400, while the sum is 44.

The square root of 656913563 is about 25630.3250662179. The cubic root of 656913563 is about 869.2994594036.

The spelling of 656913563 in words is "six hundred fifty-six million, nine hundred thirteen thousand, five hundred sixty-three".