1231323199 has 2 divisors, whose sum is σ = 1231323200. Its totient is φ = 1231323198.

The previous prime is 1231323179. The next prime is 1231323229. The reversal of 1231323199 is 9913231321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231323199 - 2⁵ = 1231323167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231323179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615661599 + 615661600.

It is an arithmetic number, because the mean of its divisors is an integer number (615661600).

Almost surely, 2^1231323199 is an apocalyptic number.

1231323199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231323199 is an equidigital number, since it uses as much as digits as its factorization.

1231323199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 34.

The square root of 1231323199 is about 35090.2151461059. The cubic root of 1231323199 is about 1071.8253406761.

The spelling of 1231323199 in words is "one billion, two hundred thirty-one million, three hundred twenty-three thousand, one hundred ninety-nine".