131185839 has 4 divisors (see below), whose sum is σ = 174914456. Its totient is φ = 87457224.

The previous prime is 131185811. The next prime is 131185849. The reversal of 131185839 is 938581131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 131185839 - 2²⁰ = 130137263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131185797 and 131185806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131185849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21864304 + ... + 21864309.

It is an arithmetic number, because the mean of its divisors is an integer number (43728614).

Almost surely, 2^131185839 is an apocalyptic number.

131185839 is a deficient number, since it is larger than the sum of its proper divisors (43728617).

131185839 is an equidigital number, since it uses as much as digits as its factorization.

131185839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43728616.

The product of its digits is 25920, while the sum is 39.

The square root of 131185839 is about 11453.6386794765. The cubic root of 131185839 is about 508.1153547428.

The spelling of 131185839 in words is "one hundred thirty-one million, one hundred eighty-five thousand, eight hundred thirty-nine".