1230131999 has 2 divisors, whose sum is σ = 1230132000. Its totient is φ = 1230131998.

The previous prime is 1230131971. The next prime is 1230132011. The reversal of 1230131999 is 9991310321.

It is a strong prime.

It is an emirp because it is prime and its reverse (9991310321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1230131999 - 2⁸ = 1230131743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230131299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615065999 + 615066000.

It is an arithmetic number, because the mean of its divisors is an integer number (615066000).

Almost surely, 2^1230131999 is an apocalyptic number.

1230131999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230131999 is an equidigital number, since it uses as much as digits as its factorization.

1230131999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 1230131999 is about 35073.2376463879. The cubic root of 1230131999 is about 1071.4795960098.

The spelling of 1230131999 in words is "one billion, two hundred thirty million, one hundred thirty-one thousand, nine hundred ninety-nine".