131554609 has 8 divisors (see below), whose sum is σ = 135086112. Its totient is φ = 128038560.

The previous prime is 131554603. The next prime is 131554627. The reversal of 131554609 is 906455131.

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 131554609 - 2⁷ = 131554481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131554603) 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 7 ways as a sum of consecutive naturals, for example, 14542 + ... + 21784.

It is an arithmetic number, because the mean of its divisors is an integer number (16885764).

Almost surely, 2^131554609 is an apocalyptic number.

It is an amenable number.

131554609 is a deficient number, since it is larger than the sum of its proper divisors (3531503).

131554609 is an equidigital number, since it uses as much as digits as its factorization.

131554609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7727.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 131554609 is about 11469.7257595812. The cubic root of 131554609 is about 508.5910219297.

The spelling of 131554609 in words is "one hundred thirty-one million, five hundred fifty-four thousand, six hundred nine".