12443415209 has 2 divisors, whose sum is σ = 12443415210. Its totient is φ = 12443415208.

The previous prime is 12443415161. The next prime is 12443415227. The reversal of 12443415209 is 90251434421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12062189584 + 381225625 = 109828^2 + 19525^2 .

It is a cyclic number.

It is not a de Polignac number, because 12443415209 - 2²⁸ = 12174979753 is a prime.

It is not a weakly prime, because it can be changed into another prime (12443411209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221707604 + 6221707605.

It is an arithmetic number, because the mean of its divisors is an integer number (6221707605).

Almost surely, 2^12443415209 is an apocalyptic number.

It is an amenable number.

12443415209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12443415209 is an equidigital number, since it uses as much as digits as its factorization.

12443415209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 12443415209 in words is "twelve billion, four hundred forty-three million, four hundred fifteen thousand, two hundred nine".