920772031 has 4 divisors (see below), whose sum is σ = 921685600. Its totient is φ = 919858464.

The previous prime is 920772023. The next prime is 920772043. The reversal of 920772031 is 130277029.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130277029 = 61 ⋅2135689.

It is a cyclic number.

It is not a de Polignac number, because 920772031 - 2³ = 920772023 is a prime.

It is a super-2 number, since 2×920772031² = 1695642266143729922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 920771984 and 920772002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920172031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455271 + ... + 457288.

It is an arithmetic number, because the mean of its divisors is an integer number (230421400).

Almost surely, 2^920772031 is an apocalyptic number.

920772031 is a deficient number, since it is larger than the sum of its proper divisors (913569).

920772031 is a wasteful number, since it uses less digits than its factorization.

920772031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913568.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 920772031 is about 30344.2256615653. The cubic root of 920772031 is about 972.8608040406.

The spelling of 920772031 in words is "nine hundred twenty million, seven hundred seventy-two thousand, thirty-one".