131233423991 has 2 divisors, whose sum is σ = 131233423992. Its totient is φ = 131233423990.

The previous prime is 131233423963. The next prime is 131233424011. The reversal of 131233423991 is 199324332131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 131233423991 - 2⁶ = 131233423927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131233423961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65616711995 + 65616711996.

It is an arithmetic number, because the mean of its divisors is an integer number (65616711996).

Almost surely, 2^131233423991 is an apocalyptic number.

131233423991 is a deficient number, since it is larger than the sum of its proper divisors (1).

131233423991 is an equidigital number, since it uses as much as digits as its factorization.

131233423991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 41.

The spelling of 131233423991 in words is "one hundred thirty-one billion, two hundred thirty-three million, four hundred twenty-three thousand, nine hundred ninety-one".