81874982 has 12 divisors (see below), whose sum is σ = 142863660. Its totient is φ = 35089236.

The previous prime is 81874951. The next prime is 81875021. The reversal of 81874982 is 28947818.

It is a congruent number.

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, 417632 + ... + 417827.

It is an arithmetic number, because the mean of its divisors is an integer number (11905305).

Almost surely, 2^81874982 is an apocalyptic number.

81874982 is a deficient number, since it is larger than the sum of its proper divisors (60988678).

81874982 is a wasteful number, since it uses less digits than its factorization.

81874982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835475 (or 835468 counting only the distinct ones).

The product of its digits is 258048, while the sum is 47.

The square root of 81874982 is about 9048.4795407847. The cubic root of 81874982 is about 434.2272483146.

The spelling of 81874982 in words is "eighty-one million, eight hundred seventy-four thousand, nine hundred eighty-two".