83139612 has 12 divisors (see below), whose sum is σ = 193992456. Its totient is φ = 27713200.

The previous prime is 83139599. The next prime is 83139631. The reversal of 83139612 is 21693138.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3464139 + ... + 3464162.

It is an arithmetic number, because the mean of its divisors is an integer number (16166038).

Almost surely, 2^83139612 is an apocalyptic number.

It is an amenable number.

83139612 is an abundant number, since it is smaller than the sum of its proper divisors (110852844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83139612 is a wasteful number, since it uses less digits than its factorization.

83139612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6928308 (or 6928306 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 83139612 is about 9118.0925636890. The cubic root of 83139612 is about 436.4515074146.

The spelling of 83139612 in words is "eighty-three million, one hundred thirty-nine thousand, six hundred twelve".