131717345 has 16 divisors (see below), whose sum is σ = 159690960. Its totient is φ = 104294400.

The previous prime is 131717317. The next prime is 131717347. The reversal of 131717345 is 543717131.

It can be written as a sum of positive squares in 8 ways, for example, as 18769 + 131698576 = 137^2 + 11476^2 .

It is not a de Polignac number, because 131717345 - 2¹⁸ = 131455201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131717347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338411 + ... + 338799.

It is an arithmetic number, because the mean of its divisors is an integer number (9980685).

Almost surely, 2^131717345 is an apocalyptic number.

It is an amenable number.

131717345 is a deficient number, since it is larger than the sum of its proper divisors (27973615).

131717345 is a wasteful number, since it uses less digits than its factorization.

131717345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916.

The product of its digits is 8820, while the sum is 32.

The square root of 131717345 is about 11476.8177209538. The cubic root of 131717345 is about 508.8006483472.

The spelling of 131717345 in words is "one hundred thirty-one million, seven hundred seventeen thousand, three hundred forty-five".