816992111 has 16 divisors (see below), whose sum is σ = 889146720. Its totient is φ = 746204160.

The previous prime is 816992087. The next prime is 816992119. The reversal of 816992111 is 111299618.

It is a de Polignac number, because none of the positive numbers 2^k-816992111 is a prime.

It is a super-2 number, since 2×816992111² = 1334952218872472642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816992119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1009475 + ... + 1010283.

It is an arithmetic number, because the mean of its divisors is an integer number (55571670).

Almost surely, 2^816992111 is an apocalyptic number.

816992111 is a deficient number, since it is larger than the sum of its proper divisors (72154609).

816992111 is a wasteful number, since it uses less digits than its factorization.

816992111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546.

The product of its digits is 7776, while the sum is 38.

The square root of 816992111 is about 28583.0738549933. The cubic root of 816992111 is about 934.8443070566.

The spelling of 816992111 in words is "eight hundred sixteen million, nine hundred ninety-two thousand, one hundred eleven".