656645323 has 2 divisors, whose sum is σ = 656645324. Its totient is φ = 656645322.

The previous prime is 656645273. The next prime is 656645329. The reversal of 656645323 is 323546656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 656645323 - 2¹⁷ = 656514251 is a prime.

It is not a weakly prime, because it can be changed into another prime (656645329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328322661 + 328322662.

It is an arithmetic number, because the mean of its divisors is an integer number (328322662).

Almost surely, 2^656645323 is an apocalyptic number.

656645323 is a deficient number, since it is larger than the sum of its proper divisors (1).

656645323 is an equidigital number, since it uses as much as digits as its factorization.

656645323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 40.

The square root of 656645323 is about 25625.0916681287. The cubic root of 656645323 is about 869.1811218496.

The spelling of 656645323 in words is "six hundred fifty-six million, six hundred forty-five thousand, three hundred twenty-three".