12243135409 has 2 divisors, whose sum is σ = 12243135410. Its totient is φ = 12243135408.

The previous prime is 12243135389. The next prime is 12243135433. The reversal of 12243135409 is 90453134221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7945939600 + 4297195809 = 89140^2 + 65553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12243135409 is a prime.

It is not a weakly prime, because it can be changed into another prime (12243135209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6121567704 + 6121567705.

It is an arithmetic number, because the mean of its divisors is an integer number (6121567705).

Almost surely, 2^12243135409 is an apocalyptic number.

It is an amenable number.

12243135409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12243135409 is an equidigital number, since it uses as much as digits as its factorization.

12243135409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 12243135409 in words is "twelve billion, two hundred forty-three million, one hundred thirty-five thousand, four hundred nine".