131313197 has 2 divisors, whose sum is σ = 131313198. Its totient is φ = 131313196.

The previous prime is 131313191. The next prime is 131313229. The reversal of 131313197 is 791313131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98982601 + 32330596 = 9949^2 + 5686^2 .

It is a cyclic number.

It is not a de Polignac number, because 131313197 - 2⁸ = 131312941 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131313191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65656598 + 65656599.

It is an arithmetic number, because the mean of its divisors is an integer number (65656599).

Almost surely, 2^131313197 is an apocalyptic number.

It is an amenable number.

131313197 is a deficient number, since it is larger than the sum of its proper divisors (1).

131313197 is an equidigital number, since it uses as much as digits as its factorization.

131313197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1701, while the sum is 29.

The square root of 131313197 is about 11459.1970486592. The cubic root of 131313197 is about 508.2797312885.

The spelling of 131313197 in words is "one hundred thirty-one million, three hundred thirteen thousand, one hundred ninety-seven".