131444609 has 8 divisors (see below), whose sum is σ = 140867520. Its totient is φ = 122330736.

The previous prime is 131444597. The next prime is 131444623. The reversal of 131444609 is 906444131.

It is a happy number.

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 131444609 - 2¹² = 131440513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131444689) 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, 76379 + ... + 78080.

It is an arithmetic number, because the mean of its divisors is an integer number (17608440).

Almost surely, 2^131444609 is an apocalyptic number.

It is an amenable number.

131444609 is a deficient number, since it is larger than the sum of its proper divisors (9422911).

131444609 is a wasteful number, since it uses less digits than its factorization.

131444609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154519.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 131444609 is about 11464.9295244236. The cubic root of 131444609 is about 508.4492288169.

The spelling of 131444609 in words is "one hundred thirty-one million, four hundred forty-four thousand, six hundred nine".