656000489 has 2 divisors, whose sum is σ = 656000490. Its totient is φ = 656000488.

The previous prime is 656000483. The next prime is 656000497. The reversal of 656000489 is 984000656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 586027264 + 69973225 = 24208^2 + 8365^2 .

It is a cyclic number.

It is not a de Polignac number, because 656000489 - 2⁴ = 656000473 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (656000483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328000244 + 328000245.

It is an arithmetic number, because the mean of its divisors is an integer number (328000245).

Almost surely, 2^656000489 is an apocalyptic number.

It is an amenable number.

656000489 is a deficient number, since it is larger than the sum of its proper divisors (1).

656000489 is an equidigital number, since it uses as much as digits as its factorization.

656000489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 656000489 is about 25612.5064958508. The cubic root of 656000489 is about 868.8965130532.

The spelling of 656000489 in words is "six hundred fifty-six million, four hundred eighty-nine", and thus it is an aban number.