620316989 has 16 divisors (see below), whose sum is σ = 659819520. Its totient is φ = 582261120.

The previous prime is 620316971. The next prime is 620317031. The reversal of 620316989 is 989613026.

It is a cyclic number.

It is not a de Polignac number, because 620316989 - 2⁸ = 620316733 is a prime.

It is a super-2 number, since 2×620316989² = 769586333684052242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620346989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148244 + ... + 152370.

It is an arithmetic number, because the mean of its divisors is an integer number (41238720).

Almost surely, 2^620316989 is an apocalyptic number.

It is an amenable number.

620316989 is a deficient number, since it is larger than the sum of its proper divisors (39502531).

620316989 is a wasteful number, since it uses less digits than its factorization.

620316989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4300.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 620316989 is about 24906.1636748818. The cubic root of 620316989 is about 852.8471946023.

The spelling of 620316989 in words is "six hundred twenty million, three hundred sixteen thousand, nine hundred eighty-nine".