131308691 has 8 divisors (see below), whose sum is σ = 134949024. Its totient is φ = 127689280.

The previous prime is 131308687. The next prime is 131308711. The reversal of 131308691 is 196803131.

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 131308691 - 2² = 131308687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131308631) 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, 7946 + ... + 18048.

It is an arithmetic number, because the mean of its divisors is an integer number (16868628).

Almost surely, 2^131308691 is an apocalyptic number.

131308691 is a deficient number, since it is larger than the sum of its proper divisors (3640333).

131308691 is a wasteful number, since it uses less digits than its factorization.

131308691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10461.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 131308691 is about 11459.0004363382. Note that the first 3 decimals coincide. The cubic root of 131308691 is about 508.2739173650.

The spelling of 131308691 in words is "one hundred thirty-one million, three hundred eight thousand, six hundred ninety-one".