12177824909 has 2 divisors, whose sum is σ = 12177824910. Its totient is φ = 12177824908.

The previous prime is 12177824851. The next prime is 12177824929. The reversal of 12177824909 is 90942877121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7735202500 + 4442622409 = 87950^2 + 66653^2 .

It is an emirp because it is prime and its reverse (90942877121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12177824909 - 2⁸ = 12177824653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12177824929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6088912454 + 6088912455.

It is an arithmetic number, because the mean of its divisors is an integer number (6088912455).

Almost surely, 2^12177824909 is an apocalyptic number.

It is an amenable number.

12177824909 is a deficient number, since it is larger than the sum of its proper divisors (1).

12177824909 is an equidigital number, since it uses as much as digits as its factorization.

12177824909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 50.

The spelling of 12177824909 in words is "twelve billion, one hundred seventy-seven million, eight hundred twenty-four thousand, nine hundred nine".