131513197 has 2 divisors, whose sum is σ = 131513198. Its totient is φ = 131513196.

The previous prime is 131513177. The next prime is 131513233. The reversal of 131513197 is 791315131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95824521 + 35688676 = 9789^2 + 5974^2 .

It is a cyclic number.

It is not a de Polignac number, because 131513197 - 2⁷ = 131513069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131513147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65756598 + 65756599.

It is an arithmetic number, because the mean of its divisors is an integer number (65756599).

Almost surely, 2^131513197 is an apocalyptic number.

It is an amenable number.

131513197 is a deficient number, since it is larger than the sum of its proper divisors (1).

131513197 is an equidigital number, since it uses as much as digits as its factorization.

131513197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2835, while the sum is 31.

The square root of 131513197 is about 11467.9203432881. The cubic root of 131513197 is about 508.5376499702.

The spelling of 131513197 in words is "one hundred thirty-one million, five hundred thirteen thousand, one hundred ninety-seven".