131357709 has 24 divisors (see below), whose sum is σ = 219465792. Its totient is φ = 74154240.

The previous prime is 131357701. The next prime is 131357731. The reversal of 131357709 is 907753131.

It is not a de Polignac number, because 131357709 - 2³ = 131357701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131357701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7332 + ... + 17789.

It is an arithmetic number, because the mean of its divisors is an integer number (9144408).

Almost surely, 2^131357709 is an apocalyptic number.

It is an amenable number.

131357709 is a deficient number, since it is larger than the sum of its proper divisors (88108083).

131357709 is a wasteful number, since it uses less digits than its factorization.

131357709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25217 (or 25214 counting only the distinct ones).

The product of its (nonzero) digits is 19845, while the sum is 36.

The square root of 131357709 is about 11461.1390795156. The cubic root of 131357709 is about 508.3371563151.

The spelling of 131357709 in words is "one hundred thirty-one million, three hundred fifty-seven thousand, seven hundred nine".