12243423139 has 4 divisors (see below), whose sum is σ = 12252792024. Its totient is φ = 12234054256.

The previous prime is 12243423133. The next prime is 12243423149. The reversal of 12243423139 is 93132434221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12243423139 - 2³ = 12243423131 is a prime.

It is a super-2 number, since 2×12243423139² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12243423131) 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, 4682482 + ... + 4685095.

It is an arithmetic number, because the mean of its divisors is an integer number (3063198006).

Almost surely, 2^12243423139 is an apocalyptic number.

12243423139 is a deficient number, since it is larger than the sum of its proper divisors (9368885).

12243423139 is an equidigital number, since it uses as much as digits as its factorization.

12243423139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9368884.

The product of its digits is 31104, while the sum is 34.

The spelling of 12243423139 in words is "twelve billion, two hundred forty-three million, four hundred twenty-three thousand, one hundred thirty-nine".