620715659 has 2 divisors, whose sum is σ = 620715660. Its totient is φ = 620715658.

The previous prime is 620715649. The next prime is 620715703. The reversal of 620715659 is 956517026.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 620715659 - 2⁴ = 620715643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (620715619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310357829 + 310357830.

It is an arithmetic number, because the mean of its divisors is an integer number (310357830).

Almost surely, 2^620715659 is an apocalyptic number.

620715659 is a deficient number, since it is larger than the sum of its proper divisors (1).

620715659 is an equidigital number, since it uses as much as digits as its factorization.

620715659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 620715659 is about 24914.1658299049. The cubic root of 620715659 is about 853.0298602309.

The spelling of 620715659 in words is "six hundred twenty million, seven hundred fifteen thousand, six hundred fifty-nine".