620716917 has 16 divisors (see below), whose sum is σ = 850872960. Its totient is φ = 402259200.

The previous prime is 620716897. The next prime is 620716931. The reversal of 620716917 is 719617026.

It is not a de Polignac number, because 620716917 - 2¹⁴ = 620700533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620716517) 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 in 15 ways as a sum of consecutive naturals, for example, 25584 + ... + 43542.

It is an arithmetic number, because the mean of its divisors is an integer number (53179560).

Almost surely, 2^620716917 is an apocalyptic number.

It is an amenable number.

620716917 is a deficient number, since it is larger than the sum of its proper divisors (230156043).

620716917 is a wasteful number, since it uses less digits than its factorization.

620716917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18284.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 620716917 is about 24914.1910765732. The cubic root of 620716917 is about 853.0304365070.

The spelling of 620716917 in words is "six hundred twenty million, seven hundred sixteen thousand, nine hundred seventeen".