131329091 has 2 divisors, whose sum is σ = 131329092. Its totient is φ = 131329090.

The previous prime is 131329073. The next prime is 131329111. The reversal of 131329091 is 190923131.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131329091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (131329001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65664545 + 65664546.

It is an arithmetic number, because the mean of its divisors is an integer number (65664546).

Almost surely, 2^131329091 is an apocalyptic number.

131329091 is a deficient number, since it is larger than the sum of its proper divisors (1).

131329091 is an equidigital number, since it uses as much as digits as its factorization.

131329091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 131329091 is about 11459.8905317634. The cubic root of 131329091 is about 508.3002376614.

The spelling of 131329091 in words is "one hundred thirty-one million, three hundred twenty-nine thousand, ninety-one".