83139631 has 2 divisors, whose sum is σ = 83139632. Its totient is φ = 83139630.

The previous prime is 83139599. The next prime is 83139647. The reversal of 83139631 is 13693138.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 83139631 - 2⁵ = 83139599 is a prime.

It is a super-2 number, since 2×83139631² = 13824396485632322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83139671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41569815 + 41569816.

It is an arithmetic number, because the mean of its divisors is an integer number (41569816).

Almost surely, 2^83139631 is an apocalyptic number.

83139631 is a deficient number, since it is larger than the sum of its proper divisors (1).

83139631 is an equidigital number, since it uses as much as digits as its factorization.

83139631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 83139631 is about 9118.0936055735. The cubic root of 83139631 is about 436.4515406622.

The spelling of 83139631 in words is "eighty-three million, one hundred thirty-nine thousand, six hundred thirty-one".