82991912 has 32 divisors (see below), whose sum is σ = 162950400. Its totient is φ = 39551424.

The previous prime is 82991911. The next prime is 82991921. The reversal of 82991912 is 21919928.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 82991912.

It is not an unprimeable number, because it can be changed into a prime (82991911) 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, 66914 + ... + 68142.

It is an arithmetic number, because the mean of its divisors is an integer number (5092200).

Almost surely, 2^82991912 is an apocalyptic number.

It is an amenable number.

82991912 is a deficient number, since it is larger than the sum of its proper divisors (79958488).

82991912 is a wasteful number, since it uses less digits than its factorization.

82991912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625 (or 1621 counting only the distinct ones).

The product of its digits is 23328, while the sum is 41.

The square root of 82991912 is about 9109.9896816627. The cubic root of 82991912 is about 436.1928978388.

The spelling of 82991912 in words is "eighty-two million, nine hundred ninety-one thousand, nine hundred twelve".