11921317 has 2 divisors, whose sum is σ = 11921318. Its totient is φ = 11921316.

The previous prime is 11921311. The next prime is 11921339. The reversal of 11921317 is 71312911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11329956 + 591361 = 3366^2 + 769^2 .

It is an emirp because it is prime and its reverse (71312911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11921317 - 2¹¹ = 11919269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11921291 and 11921300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11921311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5960658 + 5960659.

It is an arithmetic number, because the mean of its divisors is an integer number (5960659).

Almost surely, 2^11921317 is an apocalyptic number.

It is an amenable number.

11921317 is a deficient number, since it is larger than the sum of its proper divisors (1).

11921317 is an equidigital number, since it uses as much as digits as its factorization.

11921317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378, while the sum is 25.

The square root of 11921317 is about 3452.7260244624. The cubic root of 11921317 is about 228.4413644522.

The spelling of 11921317 in words is "eleven million, nine hundred twenty-one thousand, three hundred seventeen".