131290031897 has 2 divisors, whose sum is σ = 131290031898. Its totient is φ = 131290031896.

The previous prime is 131290031893. The next prime is 131290031963. The reversal of 131290031897 is 798130092131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130511677696 + 778354201 = 361264^2 + 27899^2 .

It is a cyclic number.

It is not a de Polignac number, because 131290031897 - 2² = 131290031893 is a prime.

It is not a weakly prime, because it can be changed into another prime (131290031893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65645015948 + 65645015949.

It is an arithmetic number, because the mean of its divisors is an integer number (65645015949).

Almost surely, 2^131290031897 is an apocalyptic number.

It is an amenable number.

131290031897 is a deficient number, since it is larger than the sum of its proper divisors (1).

131290031897 is an equidigital number, since it uses as much as digits as its factorization.

131290031897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 131290031897 in words is "one hundred thirty-one billion, two hundred ninety million, thirty-one thousand, eight hundred ninety-seven".