920577797 has 24 divisors (see below), whose sum is σ = 1022783832. Its totient is φ = 827858880.

The previous prime is 920577709. The next prime is 920577799. The reversal of 920577797 is 797775029.

It can be written as a sum of positive squares in 4 ways, for example, as 309548836 + 611028961 = 17594^2 + 24719^2 .

It is not a de Polignac number, because 920577797 - 2²⁶ = 853468933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (920577799) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22453097 + ... + 22453137.

It is an arithmetic number, because the mean of its divisors is an integer number (42615993).

Almost surely, 2^920577797 is an apocalyptic number.

It is an amenable number.

920577797 is a deficient number, since it is larger than the sum of its proper divisors (102206035).

920577797 is an frugal number, since it uses more digits than its factorization.

920577797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 1944810, while the sum is 53.

The square root of 920577797 is about 30341.0249826864. The cubic root of 920577797 is about 972.7923919083.

The spelling of 920577797 in words is "nine hundred twenty million, five hundred seventy-seven thousand, seven hundred ninety-seven".