1233431013 has 4 divisors (see below), whose sum is σ = 1644574688. Its totient is φ = 822287340.

The previous prime is 1233431009. The next prime is 1233431021. The reversal of 1233431013 is 3101343321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1233431013 - 2² = 1233431009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233431033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205571833 + ... + 205571838.

It is an arithmetic number, because the mean of its divisors is an integer number (411143672).

Almost surely, 2^1233431013 is an apocalyptic number.

It is an amenable number.

1233431013 is a deficient number, since it is larger than the sum of its proper divisors (411143675).

1233431013 is an equidigital number, since it uses as much as digits as its factorization.

1233431013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411143674.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1233431013 is about 35120.2365168573. The cubic root of 1233431013 is about 1072.4365857062.

Adding to 1233431013 its reverse (3101343321), we get a palindrome (4334774334).

The spelling of 1233431013 in words is "one billion, two hundred thirty-three million, four hundred thirty-one thousand, thirteen".