811976986 has 16 divisors (see below), whose sum is σ = 1260661248. Its totient is φ = 391827600.

The previous prime is 811976983. The next prime is 811976999. The reversal of 811976986 is 689679118.

It is not an unprimeable number, because it can be changed into a prime (811976983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5571 + ... + 40681.

It is an arithmetic number, because the mean of its divisors is an integer number (78791328).

Almost surely, 2^811976986 is an apocalyptic number.

811976986 is a deficient number, since it is larger than the sum of its proper divisors (448684262).

811976986 is a wasteful number, since it uses less digits than its factorization.

811976986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35517.

The product of its digits is 1306368, while the sum is 55.

The square root of 811976986 is about 28495.2098781532. The cubic root of 811976986 is about 932.9275251414.

The spelling of 811976986 in words is "eight hundred eleven million, nine hundred seventy-six thousand, nine hundred eighty-six".