1231403113 has 16 divisors (see below), whose sum is σ = 1268809920. Its totient is φ = 1194616384.

The previous prime is 1231403077. The next prime is 1231403119. The reversal of 1231403113 is 3113041321.

It is a cyclic number.

It is not a de Polignac number, because 1231403113 - 2²⁵ = 1197848681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231403119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2779470 + ... + 2779912.

It is an arithmetic number, because the mean of its divisors is an integer number (79300620).

Almost surely, 2^1231403113 is an apocalyptic number.

It is an amenable number.

1231403113 is a deficient number, since it is larger than the sum of its proper divisors (37406807).

1231403113 is a wasteful number, since it uses less digits than its factorization.

1231403113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1231403113 is about 35091.3538211338. The cubic root of 1231403113 is about 1071.8485276556.

Adding to 1231403113 its reverse (3113041321), we get a palindrome (4344444434).

It can be divided in two parts, 123140 and 3113, that added together give a triangular number (126253 = T₅₀₂).

The spelling of 1231403113 in words is "one billion, two hundred thirty-one million, four hundred three thousand, one hundred thirteen".