83139507 has 32 divisors (see below), whose sum is σ = 135298560. Its totient is φ = 50038560.

The previous prime is 83139499. The next prime is 83139517. The reversal of 83139507 is 70593138.

It is not a de Polignac number, because 83139507 - 2³ = 83139499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83139517) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45738 + ... + 47520.

It is an arithmetic number, because the mean of its divisors is an integer number (4228080).

Almost surely, 2^83139507 is an apocalyptic number.

83139507 is a deficient number, since it is larger than the sum of its proper divisors (52159053).

83139507 is a wasteful number, since it uses less digits than its factorization.

83139507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960 (or 1954 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 83139507 is about 9118.0868059040. The cubic root of 83139507 is about 436.4513236778.

The spelling of 83139507 in words is "eighty-three million, one hundred thirty-nine thousand, five hundred seven".