620520657 has 8 divisors (see below), whose sum is σ = 863333184. Its totient is φ = 395694288.

The previous prime is 620520653. The next prime is 620520683. The reversal of 620520657 is 756025026.

620520657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 620520657 - 2² = 620520653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (620520653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4496458 + ... + 4496595.

It is an arithmetic number, because the mean of its divisors is an integer number (107916648).

Almost surely, 2^620520657 is an apocalyptic number.

It is an amenable number.

620520657 is a deficient number, since it is larger than the sum of its proper divisors (242812527).

620520657 is a wasteful number, since it uses less digits than its factorization.

620520657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8993079.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 620520657 is about 24910.2520460954. The cubic root of 620520657 is about 852.9405225185.

It can be divided in two parts, 6205 and 20657, that added together give a palindrome (26862).

The spelling of 620520657 in words is "six hundred twenty million, five hundred twenty thousand, six hundred fifty-seven".