131915609 has 8 divisors (see below), whose sum is σ = 150840960. Its totient is φ = 113010336.

The previous prime is 131915579. The next prime is 131915621. The reversal of 131915609 is 906519131.

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 131915609 - 2¹² = 131911513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131915629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13757 + ... + 21285.

It is an arithmetic number, because the mean of its divisors is an integer number (18855120).

Almost surely, 2^131915609 is an apocalyptic number.

It is an amenable number.

131915609 is a deficient number, since it is larger than the sum of its proper divisors (18925351).

131915609 is an equidigital number, since it uses as much as digits as its factorization.

131915609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10039.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 131915609 is about 11485.4520590180. The cubic root of 131915609 is about 509.0558065421.

The spelling of 131915609 in words is "one hundred thirty-one million, nine hundred fifteen thousand, six hundred nine".