11247197309 has 2 divisors, whose sum is σ = 11247197310. Its totient is φ = 11247197308.

The previous prime is 11247197303. The next prime is 11247197321. The reversal of 11247197309 is 90379174211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7520705284 + 3726492025 = 86722^2 + 61045^2 .

It is a cyclic number.

It is not a de Polignac number, because 11247197309 - 2⁸ = 11247197053 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11247197309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11247197303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5623598654 + 5623598655.

It is an arithmetic number, because the mean of its divisors is an integer number (5623598655).

Almost surely, 2^11247197309 is an apocalyptic number.

It is an amenable number.

11247197309 is a deficient number, since it is larger than the sum of its proper divisors (1).

11247197309 is an equidigital number, since it uses as much as digits as its factorization.

11247197309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 44.

The spelling of 11247197309 in words is "eleven billion, two hundred forty-seven million, one hundred ninety-seven thousand, three hundred nine".