131996537 has 2 divisors, whose sum is σ = 131996538. Its totient is φ = 131996536.

The previous prime is 131996531. The next prime is 131996573. The reversal of 131996537 is 735699131.

Together with next prime (131996573) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125865961 + 6130576 = 11219^2 + 2476^2 .

It is a cyclic number.

It is not a de Polignac number, because 131996537 - 2⁴ = 131996521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131996531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65998268 + 65998269.

It is an arithmetic number, because the mean of its divisors is an integer number (65998269).

Almost surely, 2^131996537 is an apocalyptic number.

It is an amenable number.

131996537 is a deficient number, since it is larger than the sum of its proper divisors (1).

131996537 is an equidigital number, since it uses as much as digits as its factorization.

131996537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 44.

The square root of 131996537 is about 11488.9745843570. The cubic root of 131996537 is about 509.1598843106.

The spelling of 131996537 in words is "one hundred thirty-one million, nine hundred ninety-six thousand, five hundred thirty-seven".