11115917 has 2 divisors, whose sum is σ = 11115918. Its totient is φ = 11115916.

The previous prime is 11115913. The next prime is 11115953. The reversal of 11115917 is 71951111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11115556 + 361 = 3334^2 + 19^2 .

It is an emirp because it is prime and its reverse (71951111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11115917 - 2² = 11115913 is a prime.

It is a super-2 number, since 2×11115917² = 247127221501778, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11115913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5557958 + 5557959.

It is an arithmetic number, because the mean of its divisors is an integer number (5557959).

Almost surely, 2^11115917 is an apocalyptic number.

It is an amenable number.

11115917 is a deficient number, since it is larger than the sum of its proper divisors (1).

11115917 is an equidigital number, since it uses as much as digits as its factorization.

11115917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 315, while the sum is 26.

The square root of 11115917 is about 3334.0541387326. The cubic root of 11115917 is about 223.1764842605.

The spelling of 11115917 in words is "eleven million, one hundred fifteen thousand, nine hundred seventeen".