920788621 has 12 divisors (see below), whose sum is σ = 973787232. Its totient is φ = 870544584.

The previous prime is 920788613. The next prime is 920788669. The reversal of 920788621 is 126887029.

It is not a de Polignac number, because 920788621 - 2³ = 920788613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920788021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195136 + ... + 199798.

It is an arithmetic number, because the mean of its divisors is an integer number (81148936).

Almost surely, 2^920788621 is an apocalyptic number.

It is an amenable number.

920788621 is a deficient number, since it is larger than the sum of its proper divisors (52998611).

920788621 is a wasteful number, since it uses less digits than its factorization.

920788621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248 (or 5229 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 920788621 is about 30344.4990237110. The cubic root of 920788621 is about 972.8666468418.

The spelling of 920788621 in words is "nine hundred twenty million, seven hundred eighty-eight thousand, six hundred twenty-one".