1231793913 has 16 divisors (see below), whose sum is σ = 1878497280. Its totient is φ = 703328016.

The previous prime is 1231793891. The next prime is 1231793999. The reversal of 1231793913 is 3193971321.

It is not a de Polignac number, because 1231793913 - 2²⁵ = 1198239481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231793513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5008 + ... + 49886.

It is an arithmetic number, because the mean of its divisors is an integer number (117406080).

Almost surely, 2^1231793913 is an apocalyptic number.

It is an amenable number.

1231793913 is a deficient number, since it is larger than the sum of its proper divisors (646703367).

1231793913 is a wasteful number, since it uses less digits than its factorization.

1231793913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46196.

The product of its digits is 30618, while the sum is 39.

The square root of 1231793913 is about 35096.9217026223. The cubic root of 1231793913 is about 1071.9619034992.

The spelling of 1231793913 in words is "one billion, two hundred thirty-one million, seven hundred ninety-three thousand, nine hundred thirteen".