656561459 has 2 divisors, whose sum is σ = 656561460. Its totient is φ = 656561458.

The previous prime is 656561447. The next prime is 656561467. The reversal of 656561459 is 954165656.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 656561459 - 2⁸ = 656561203 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (656561429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328280729 + 328280730.

It is an arithmetic number, because the mean of its divisors is an integer number (328280730).

Almost surely, 2^656561459 is an apocalyptic number.

656561459 is a deficient number, since it is larger than the sum of its proper divisors (1).

656561459 is an equidigital number, since it uses as much as digits as its factorization.

656561459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972000, while the sum is 47.

The square root of 656561459 is about 25623.4552510000. The cubic root of 656561459 is about 869.1441175458.

The spelling of 656561459 in words is "six hundred fifty-six million, five hundred sixty-one thousand, four hundred fifty-nine".