131534609 has 4 divisors (see below), whose sum is σ = 131656704. Its totient is φ = 131412516.

The previous prime is 131534591. The next prime is 131534617. The reversal of 131534609 is 906435131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131534609 - 2¹⁶ = 131469073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131534629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59417 + ... + 61590.

It is an arithmetic number, because the mean of its divisors is an integer number (32914176).

Almost surely, 2^131534609 is an apocalyptic number.

It is an amenable number.

131534609 is a deficient number, since it is larger than the sum of its proper divisors (122095).

131534609 is a wasteful number, since it uses less digits than its factorization.

131534609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122094.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 131534609 is about 11468.8538660147. The cubic root of 131534609 is about 508.5652472444.

The spelling of 131534609 in words is "one hundred thirty-one million, five hundred thirty-four thousand, six hundred nine".