12431323409 has 2 divisors, whose sum is σ = 12431323410. Its totient is φ = 12431323408.

The previous prime is 12431323403. The next prime is 12431323417. The reversal of 12431323409 is 90432313421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9568752400 + 2862571009 = 97820^2 + 53503^2 .

It is a cyclic number.

It is not a de Polignac number, because 12431323409 - 2²⁰ = 12430274833 is a prime.

It is not a weakly prime, because it can be changed into another prime (12431323403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6215661704 + 6215661705.

It is an arithmetic number, because the mean of its divisors is an integer number (6215661705).

Almost surely, 2^12431323409 is an apocalyptic number.

It is an amenable number.

12431323409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12431323409 is an equidigital number, since it uses as much as digits as its factorization.

12431323409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 12431323409 in words is "twelve billion, four hundred thirty-one million, three hundred twenty-three thousand, four hundred nine".