12197040409 has 2 divisors, whose sum is σ = 12197040410. Its totient is φ = 12197040408.

The previous prime is 12197040403. The next prime is 12197040433. The reversal of 12197040409 is 90404079121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12111662809 + 85377600 = 110053^2 + 9240^2 .

It is an emirp because it is prime and its reverse (90404079121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12197040409 - 2⁷ = 12197040281 is a prime.

It is not a weakly prime, because it can be changed into another prime (12197040403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6098520204 + 6098520205.

It is an arithmetic number, because the mean of its divisors is an integer number (6098520205).

Almost surely, 2^12197040409 is an apocalyptic number.

It is an amenable number.

12197040409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12197040409 is an equidigital number, since it uses as much as digits as its factorization.

12197040409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 12197040409 in words is "twelve billion, one hundred ninety-seven million, forty thousand, four hundred nine".