920630645 has 16 divisors (see below), whose sum is σ = 1233220032. Its totient is φ = 653976960.

The previous prime is 920630593. The next prime is 920630663. The reversal of 920630645 is 546036029.

It is not a de Polignac number, because 920630645 - 2²² = 916436341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192272 + ... + 197001.

It is an arithmetic number, because the mean of its divisors is an integer number (77076252).

Almost surely, 2^920630645 is an apocalyptic number.

It is an amenable number.

920630645 is a deficient number, since it is larger than the sum of its proper divisors (312589387).

920630645 is a wasteful number, since it uses less digits than its factorization.

920630645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389332.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 920630645 is about 30341.8958702320. The cubic root of 920630645 is about 972.8110067205.

The spelling of 920630645 in words is "nine hundred twenty million, six hundred thirty thousand, six hundred forty-five".