131097517 has 2 divisors, whose sum is σ = 131097518. Its totient is φ = 131097516.

The previous prime is 131097509. The next prime is 131097559. The reversal of 131097517 is 715790131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94361796 + 36735721 = 9714^2 + 6061^2 .

It is a cyclic number.

It is not a de Polignac number, because 131097517 - 2³ = 131097509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131097917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65548758 + 65548759.

It is an arithmetic number, because the mean of its divisors is an integer number (65548759).

Almost surely, 2^131097517 is an apocalyptic number.

It is an amenable number.

131097517 is a deficient number, since it is larger than the sum of its proper divisors (1).

131097517 is an equidigital number, since it uses as much as digits as its factorization.

131097517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6615, while the sum is 34.

The square root of 131097517 is about 11449.7823996790. The cubic root of 131097517 is about 508.0012981243.

The spelling of 131097517 in words is "one hundred thirty-one million, ninety-seven thousand, five hundred seventeen".