131234439 has 16 divisors (see below), whose sum is σ = 206428160. Its totient is φ = 72571680.

The previous prime is 131234437. The next prime is 131234443. The reversal of 131234439 is 934432131.

It is not a de Polignac number, because 131234439 - 2¹ = 131234437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131234437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100144 + ... + 101445.

It is an arithmetic number, because the mean of its divisors is an integer number (12901760).

Almost surely, 2^131234439 is an apocalyptic number.

131234439 is a deficient number, since it is larger than the sum of its proper divisors (75193721).

131234439 is a wasteful number, since it uses less digits than its factorization.

131234439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201630.

The product of its digits is 7776, while the sum is 30.

The square root of 131234439 is about 11455.7600795408. The cubic root of 131234439 is about 508.1780936216.

The spelling of 131234439 in words is "one hundred thirty-one million, two hundred thirty-four thousand, four hundred thirty-nine".