12431189 has 2 divisors, whose sum is σ = 12431190. Its totient is φ = 12431188.

The previous prime is 12431183. The next prime is 12431191. The reversal of 12431189 is 98113421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10562500 + 1868689 = 3250^2 + 1367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12431189 is a prime.

Together with 12431191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12431183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6215594 + 6215595.

It is an arithmetic number, because the mean of its divisors is an integer number (6215595).

Almost surely, 2^12431189 is an apocalyptic number.

It is an amenable number.

12431189 is a deficient number, since it is larger than the sum of its proper divisors (1).

12431189 is an equidigital number, since it uses as much as digits as its factorization.

12431189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 29.

The square root of 12431189 is about 3525.7891315279. The cubic root of 12431189 is about 231.6528013601.

It can be divided in two parts, 124 and 31189, that added together give a palindrome (31313).

The spelling of 12431189 in words is "twelve million, four hundred thirty-one thousand, one hundred eighty-nine".