131437009 has 8 divisors (see below), whose sum is σ = 143534880. Its totient is φ = 119364000.

The previous prime is 131436983. The next prime is 131437027. The reversal of 131437009 is 900734131.

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

It is a cyclic number.

It is not a de Polignac number, because 131437009 - 2²¹ = 129339857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131437109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5877 + ... + 17245.

It is an arithmetic number, because the mean of its divisors is an integer number (17941860).

Almost surely, 2^131437009 is an apocalyptic number.

It is an amenable number.

131437009 is a deficient number, since it is larger than the sum of its proper divisors (12097871).

131437009 is a wasteful number, since it uses less digits than its factorization.

131437009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12431.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 131437009 is about 11464.5980740713. The cubic root of 131437009 is about 508.4394292807.

The spelling of 131437009 in words is "one hundred thirty-one million, four hundred thirty-seven thousand, nine".