83871812 has 12 divisors (see below), whose sum is σ = 155409660. Its totient is φ = 39469056.

The previous prime is 83871797. The next prime is 83871881. The reversal of 83871812 is 21817838.

It can be written as a sum of positive squares in 2 ways, for example, as 72148036 + 11723776 = 8494^2 + 3424^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 616637 + ... + 616772.

It is an arithmetic number, because the mean of its divisors is an integer number (12950805).

Almost surely, 2^83871812 is an apocalyptic number.

It is an amenable number.

83871812 is a deficient number, since it is larger than the sum of its proper divisors (71537848).

83871812 is a wasteful number, since it uses less digits than its factorization.

83871812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233430 (or 1233428 counting only the distinct ones).

The product of its digits is 21504, while the sum is 38.

The square root of 83871812 is about 9158.1554911456. The cubic root of 83871812 is about 437.7290220772.

The spelling of 83871812 in words is "eighty-three million, eight hundred seventy-one thousand, eight hundred twelve".