656602043 has 2 divisors, whose sum is σ = 656602044. Its totient is φ = 656602042.

The previous prime is 656602027. The next prime is 656602069. The reversal of 656602043 is 340206656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656602043 - 2⁴ = 656602027 is a prime.

It is a super-2 number, since 2×656602043² = 862252485743547698, which contains 22 as substring.

It is equal to p_34118690 and since 656602043 and 34118690 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (656602943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328301021 + 328301022.

It is an arithmetic number, because the mean of its divisors is an integer number (328301022).

Almost surely, 2^656602043 is an apocalyptic number.

656602043 is a deficient number, since it is larger than the sum of its proper divisors (1).

656602043 is an equidigital number, since it uses as much as digits as its factorization.

656602043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 656602043 is about 25624.2471694292. The cubic root of 656602043 is about 869.1620252972.

Adding to 656602043 its reverse (340206656), we get a palindrome (996808699).

The spelling of 656602043 in words is "six hundred fifty-six million, six hundred two thousand, forty-three".