131338091 has 2 divisors, whose sum is σ = 131338092. Its totient is φ = 131338090.

The previous prime is 131338087. The next prime is 131338093. The reversal of 131338091 is 190833131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131338091 - 2² = 131338087 is a prime.

Together with 131338093, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131338093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65669045 + 65669046.

It is an arithmetic number, because the mean of its divisors is an integer number (65669046).

Almost surely, 2^131338091 is an apocalyptic number.

131338091 is a deficient number, since it is larger than the sum of its proper divisors (1).

131338091 is an equidigital number, since it uses as much as digits as its factorization.

131338091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 131338091 is about 11460.2831989441. The cubic root of 131338091 is about 508.3118486903.

The spelling of 131338091 in words is "one hundred thirty-one million, three hundred thirty-eight thousand, ninety-one".