131291137 has 2 divisors, whose sum is σ = 131291138. Its totient is φ = 131291136.

The previous prime is 131291131. The next prime is 131291179. The reversal of 131291137 is 731192131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100721296 + 30569841 = 10036^2 + 5529^2 .

It is a cyclic number.

It is not a de Polignac number, because 131291137 - 2¹¹ = 131289089 is a prime.

It is not a weakly prime, because it can be changed into another prime (131291131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65645568 + 65645569.

It is an arithmetic number, because the mean of its divisors is an integer number (65645569).

Almost surely, 2^131291137 is an apocalyptic number.

It is an amenable number.

131291137 is a deficient number, since it is larger than the sum of its proper divisors (1).

131291137 is an equidigital number, since it uses as much as digits as its factorization.

131291137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134, while the sum is 28.

The square root of 131291137 is about 11458.2344626037. The cubic root of 131291137 is about 508.2512668258.

The spelling of 131291137 in words is "one hundred thirty-one million, two hundred ninety-one thousand, one hundred thirty-seven".