131497 has 2 divisors, whose sum is σ = 131498. Its totient is φ = 131496.

The previous prime is 131489. The next prime is 131501. The reversal of 131497 is 794131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126736 + 4761 = 356^2 + 69^2 .

It is a cyclic number.

It is not a de Polignac number, because 131497 - 2³ = 131489 is a prime.

It is a super-2 number, since 2×131497² = 34582922018, which contains 22 as substring.

131497 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (131437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65748 + 65749.

It is an arithmetic number, because the mean of its divisors is an integer number (65749).

2¹³¹⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

131497 is a deficient number, since it is larger than the sum of its proper divisors (1).

131497 is an equidigital number, since it uses as much as digits as its factorization.

131497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 25.

The square root of 131497 is about 362.6251508100. The cubic root of 131497 is about 50.8516772161.

The spelling of 131497 in words is "one hundred thirty-one thousand, four hundred ninety-seven".