131493157 has 2 divisors, whose sum is σ = 131493158. Its totient is φ = 131493156.

The previous prime is 131493151. The next prime is 131493211. The reversal of 131493157 is 751394131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85266756 + 46226401 = 9234^2 + 6799^2 .

It is an emirp because it is prime and its reverse (751394131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131493157 - 2¹¹ = 131491109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131493151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65746578 + 65746579.

It is an arithmetic number, because the mean of its divisors is an integer number (65746579).

Almost surely, 2^131493157 is an apocalyptic number.

It is an amenable number.

131493157 is a deficient number, since it is larger than the sum of its proper divisors (1).

131493157 is an equidigital number, since it uses as much as digits as its factorization.

131493157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 34.

The square root of 131493157 is about 11467.0465683192. The cubic root of 131493157 is about 508.5118183112.

The spelling of 131493157 in words is "one hundred thirty-one million, four hundred ninety-three thousand, one hundred fifty-seven".