12279617309 has 2 divisors, whose sum is σ = 12279617310. Its totient is φ = 12279617308.

The previous prime is 12279617279. The next prime is 12279617411. The reversal of 12279617309 is 90371697221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9637348900 + 2642268409 = 98170^2 + 51403^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12279617309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12279617809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6139808654 + 6139808655.

It is an arithmetic number, because the mean of its divisors is an integer number (6139808655).

Almost surely, 2^12279617309 is an apocalyptic number.

It is an amenable number.

12279617309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12279617309 is an equidigital number, since it uses as much as digits as its factorization.

12279617309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 47.

The spelling of 12279617309 in words is "twelve billion, two hundred seventy-nine million, six hundred seventeen thousand, three hundred nine".