131544009 has 12 divisors (see below), whose sum is σ = 194427376. Its totient is φ = 85656312.

The previous prime is 131544001. The next prime is 131544013. The reversal of 131544009 is 900445131.

It is not a de Polignac number, because 131544009 - 2³ = 131544001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131544001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169567 + ... + 170340.

Almost surely, 2^131544009 is an apocalyptic number.

It is an amenable number.

131544009 is a deficient number, since it is larger than the sum of its proper divisors (62883367).

131544009 is a wasteful number, since it uses less digits than its factorization.

131544009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339956 (or 339953 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 131544009 is about 11469.2636642463. The cubic root of 131544009 is about 508.5773616719.

The spelling of 131544009 in words is "one hundred thirty-one million, five hundred forty-four thousand, nine".