131440439 has 8 divisors (see below), whose sum is σ = 141839712. Its totient is φ = 121082400.

The previous prime is 131440433. The next prime is 131440457. The reversal of 131440439 is 934044131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131440439 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 (131440433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3512 + ... + 16589.

It is an arithmetic number, because the mean of its divisors is an integer number (17729964).

Almost surely, 2^131440439 is an apocalyptic number.

131440439 is a deficient number, since it is larger than the sum of its proper divisors (10399273).

131440439 is a wasteful number, since it uses less digits than its factorization.

131440439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20617.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 131440439 is about 11464.7476640352. The cubic root of 131440439 is about 508.4438520129.

The spelling of 131440439 in words is "one hundred thirty-one million, four hundred forty thousand, four hundred thirty-nine".