131329999 has 2 divisors, whose sum is σ = 131330000. Its totient is φ = 131329998.

The previous prime is 131329963. The next prime is 131330021. The reversal of 131329999 is 999923131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131329999 - 2⁷ = 131329871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131329699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65664999 + 65665000.

It is an arithmetic number, because the mean of its divisors is an integer number (65665000).

Almost surely, 2^131329999 is an apocalyptic number.

131329999 is a deficient number, since it is larger than the sum of its proper divisors (1).

131329999 is an equidigital number, since it uses as much as digits as its factorization.

131329999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 118098, while the sum is 46.

The square root of 131329999 is about 11459.9301481292. The cubic root of 131329999 is about 508.3014091092.

The spelling of 131329999 in words is "one hundred thirty-one million, three hundred twenty-nine thousand, nine hundred ninety-nine".