131696909 has 8 divisors (see below), whose sum is σ = 141808320. Its totient is φ = 121848256.

The previous prime is 131696869. The next prime is 131696911. The reversal of 131696909 is 909696131.

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 a de Polignac number, because none of the positive numbers 2^k-131696909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131696909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131696989) 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, 64649 + ... + 66654.

It is an arithmetic number, because the mean of its divisors is an integer number (17726040).

Almost surely, 2^131696909 is an apocalyptic number.

It is an amenable number.

131696909 is a deficient number, since it is larger than the sum of its proper divisors (10111411).

131696909 is a wasteful number, since it uses less digits than its factorization.

131696909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131379.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 131696909 is about 11475.9273699340. The cubic root of 131696909 is about 508.7743334432.

The spelling of 131696909 in words is "one hundred thirty-one million, six hundred ninety-six thousand, nine hundred nine".