620958857 has 2 divisors, whose sum is σ = 620958858. Its totient is φ = 620958856.

The previous prime is 620958851. The next prime is 620958953. The reversal of 620958857 is 758859026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358875136 + 262083721 = 18944^2 + 16189^2 .

It is a cyclic number.

It is not a de Polignac number, because 620958857 - 2⁸ = 620958601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620958851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310479428 + 310479429.

It is an arithmetic number, because the mean of its divisors is an integer number (310479429).

Almost surely, 2^620958857 is an apocalyptic number.

It is an amenable number.

620958857 is a deficient number, since it is larger than the sum of its proper divisors (1).

620958857 is an equidigital number, since it uses as much as digits as its factorization.

620958857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The square root of 620958857 is about 24919.0460692218. The cubic root of 620958857 is about 853.1412521192.

The spelling of 620958857 in words is "six hundred twenty million, nine hundred fifty-eight thousand, eight hundred fifty-seven".