131549897 has 2 divisors, whose sum is σ = 131549898. Its totient is φ = 131549896.

The previous prime is 131549879. The next prime is 131549909. The reversal of 131549897 is 798945131.

Together with previous prime (131549879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110901961 + 20647936 = 10531^2 + 4544^2 .

It is a cyclic number.

It is not a de Polignac number, because 131549897 - 2⁸ = 131549641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131549867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65774948 + 65774949.

It is an arithmetic number, because the mean of its divisors is an integer number (65774949).

Almost surely, 2^131549897 is an apocalyptic number.

It is an amenable number.

131549897 is a deficient number, since it is larger than the sum of its proper divisors (1).

131549897 is an equidigital number, since it uses as much as digits as its factorization.

131549897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 131549897 is about 11469.5203474252. The cubic root of 131549897 is about 508.5849496491.

The spelling of 131549897 in words is "one hundred thirty-one million, five hundred forty-nine thousand, eight hundred ninety-seven".