816922972 has 6 divisors (see below), whose sum is σ = 1429615208. Its totient is φ = 408461484.

The previous prime is 816922961. The next prime is 816923021. The reversal of 816922972 is 279229618.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102115368 + ... + 102115375.

Almost surely, 2^816922972 is an apocalyptic number.

It is an amenable number.

816922972 is a deficient number, since it is larger than the sum of its proper divisors (612692236).

816922972 is a wasteful number, since it uses less digits than its factorization.

816922972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204230747 (or 204230745 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 816922972 is about 28581.8643898539. The cubic root of 816922972 is about 934.8179355152.

The spelling of 816922972 in words is "eight hundred sixteen million, nine hundred twenty-two thousand, nine hundred seventy-two".