131709357 has 18 divisors (see below), whose sum is σ = 205074506. Its totient is φ = 80975520.

The previous prime is 131709313. The next prime is 131709367. The reversal of 131709357 is 753907131.

It can be written as a sum of positive squares in 3 ways, for example, as 16232841 + 115476516 = 4029^2 + 10746^2 .

It is not a de Polignac number, because 131709357 - 2²² = 127515053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131709367) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 123607 + ... + 124667.

Almost surely, 2^131709357 is an apocalyptic number.

It is an amenable number.

131709357 is a deficient number, since it is larger than the sum of its proper divisors (73365149).

131709357 is an equidigital number, since it uses as much as digits as its factorization.

131709357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141 (or 1077 counting only the distinct ones).

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

The square root of 131709357 is about 11476.4697098019. The cubic root of 131709357 is about 508.7903627321.

The spelling of 131709357 in words is "one hundred thirty-one million, seven hundred nine thousand, three hundred fifty-seven".