1231993113 has 8 divisors (see below), whose sum is σ = 1769015808. Its totient is φ = 758149584.

The previous prime is 1231993073. The next prime is 1231993121. The reversal of 1231993113 is 3113991321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231993113 - 2¹⁴ = 1231976729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231993123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15794745 + ... + 15794822.

It is an arithmetic number, because the mean of its divisors is an integer number (221126976).

Almost surely, 2^1231993113 is an apocalyptic number.

1231993113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1231993113 is a deficient number, since it is larger than the sum of its proper divisors (537022695).

1231993113 is a wasteful number, since it uses less digits than its factorization.

1231993113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31589583.

The product of its digits is 4374, while the sum is 33.

The square root of 1231993113 is about 35099.7594436201. The cubic root of 1231993113 is about 1072.0196846208.

The spelling of 1231993113 in words is "one billion, two hundred thirty-one million, nine hundred ninety-three thousand, one hundred thirteen".