656462839 has 2 divisors, whose sum is σ = 656462840. Its totient is φ = 656462838.

The previous prime is 656462827. The next prime is 656462887. The reversal of 656462839 is 938264656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 656462839 - 2¹³ = 656454647 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 656462792 and 656462801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656462819) 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, 328231419 + 328231420.

It is an arithmetic number, because the mean of its divisors is an integer number (328231420).

Almost surely, 2^656462839 is an apocalyptic number.

656462839 is a deficient number, since it is larger than the sum of its proper divisors (1).

656462839 is an equidigital number, since it uses as much as digits as its factorization.

656462839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 49.

The square root of 656462839 is about 25621.5307700379. The cubic root of 656462839 is about 869.1005982460.

The spelling of 656462839 in words is "six hundred fifty-six million, four hundred sixty-two thousand, eight hundred thirty-nine".