131391149 has 2 divisors, whose sum is σ = 131391150. Its totient is φ = 131391148.

The previous prime is 131391049. The next prime is 131391151. The reversal of 131391149 is 941193131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130942249 + 448900 = 11443^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 131391149 - 2²⁰ = 130342573 is a prime.

Together with 131391151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131391049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65695574 + 65695575.

It is an arithmetic number, because the mean of its divisors is an integer number (65695575).

Almost surely, 2^131391149 is an apocalyptic number.

It is an amenable number.

131391149 is a deficient number, since it is larger than the sum of its proper divisors (1).

131391149 is an equidigital number, since it uses as much as digits as its factorization.

131391149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 32.

The square root of 131391149 is about 11462.5978294626. The cubic root of 131391149 is about 508.3802887976.

The spelling of 131391149 in words is "one hundred thirty-one million, three hundred ninety-one thousand, one hundred forty-nine".