131131199 has 2 divisors, whose sum is σ = 131131200. Its totient is φ = 131131198.

The previous prime is 131131193. The next prime is 131131279. The reversal of 131131199 is 991131131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131131199 - 2⁸ = 131130943 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 (131131193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65565599 + 65565600.

It is an arithmetic number, because the mean of its divisors is an integer number (65565600).

Almost surely, 2^131131199 is an apocalyptic number.

131131199 is a deficient number, since it is larger than the sum of its proper divisors (1).

131131199 is an equidigital number, since it uses as much as digits as its factorization.

131131199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 729, while the sum is 29.

The square root of 131131199 is about 11451.2531628639. The cubic root of 131131199 is about 508.0448001803.

The spelling of 131131199 in words is "one hundred thirty-one million, one hundred thirty-one thousand, one hundred ninety-nine".