12409289 has 2 divisors, whose sum is σ = 12409290. Its totient is φ = 12409288.

The previous prime is 12409279. The next prime is 12409333. The reversal of 12409289 is 98290421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12369289 + 40000 = 3517^2 + 200^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12409289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12409219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6204644 + 6204645.

It is an arithmetic number, because the mean of its divisors is an integer number (6204645).

Almost surely, 2^12409289 is an apocalyptic number.

It is an amenable number.

12409289 is a deficient number, since it is larger than the sum of its proper divisors (1).

12409289 is an equidigital number, since it uses as much as digits as its factorization.

12409289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 12409289 is about 3522.6820747834. The cubic root of 12409289 is about 231.5166873108.

The spelling of 12409289 in words is "twelve million, four hundred nine thousand, two hundred eighty-nine".