131230999 has 2 divisors, whose sum is σ = 131231000. Its totient is φ = 131230998.

The previous prime is 131230993. The next prime is 131231027. The reversal of 131230999 is 999032131.

It is a weak prime.

It is an emirp because it is prime and its reverse (999032131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131230999 - 2³ = 131230991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131230991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65615499 + 65615500.

It is an arithmetic number, because the mean of its divisors is an integer number (65615500).

Almost surely, 2^131230999 is an apocalyptic number.

131230999 is a deficient number, since it is larger than the sum of its proper divisors (1).

131230999 is an equidigital number, since it uses as much as digits as its factorization.

131230999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 131230999 is about 11455.6099357476. The cubic root of 131230999 is about 508.1736533545.

The spelling of 131230999 in words is "one hundred thirty-one million, two hundred thirty thousand, nine hundred ninety-nine".