813497922 has 12 divisors (see below), whose sum is σ = 1762578870. Its totient is φ = 271165968.

The previous prime is 813497897. The next prime is 813497941. The reversal of 813497922 is 229794318.

It can be written as a sum of positive squares in only one way, i.e., 745781481 + 67716441 = 27309^2 + 8229^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22597147 + ... + 22597182.

Almost surely, 2^813497922 is an apocalyptic number.

813497922 is an abundant number, since it is smaller than the sum of its proper divisors (949080948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813497922 is a wasteful number, since it uses less digits than its factorization.

813497922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45194337 (or 45194334 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 813497922 is about 28521.8849657592. The cubic root of 813497922 is about 933.5096590617.

The spelling of 813497922 in words is "eight hundred thirteen million, four hundred ninety-seven thousand, nine hundred twenty-two".