83191312 has 20 divisors (see below), whose sum is σ = 163827436. Its totient is φ = 40913280.

The previous prime is 83191301. The next prime is 83191333. The reversal of 83191312 is 21319138.

It can be written as a sum of positive squares in 2 ways, for example, as 24760576 + 58430736 = 4976^2 + 7644^2 .

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, 41643 + ... + 43594.

Almost surely, 2^83191312 is an apocalyptic number.

It is an amenable number.

83191312 is a deficient number, since it is larger than the sum of its proper divisors (80636124).

83191312 is a wasteful number, since it uses less digits than its factorization.

83191312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85306 (or 85300 counting only the distinct ones).

The product of its digits is 1296, while the sum is 28.

The square root of 83191312 is about 9120.9271458553. The cubic root of 83191312 is about 436.5419571484.

The spelling of 83191312 in words is "eighty-three million, one hundred ninety-one thousand, three hundred twelve".