11117857 has 2 divisors, whose sum is σ = 11117858. Its totient is φ = 11117856.

The previous prime is 11117833. The next prime is 11117893. The reversal of 11117857 is 75871111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5716881 + 5400976 = 2391^2 + 2324^2 .

It is an emirp because it is prime and its reverse (75871111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11117857 is a prime.

It is not a weakly prime, because it can be changed into another prime (11117807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5558928 + 5558929.

It is an arithmetic number, because the mean of its divisors is an integer number (5558929).

Almost surely, 2^11117857 is an apocalyptic number.

It is an amenable number.

11117857 is a deficient number, since it is larger than the sum of its proper divisors (1).

11117857 is an equidigital number, since it uses as much as digits as its factorization.

11117857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1960, while the sum is 31.

The square root of 11117857 is about 3334.3450631271. The cubic root of 11117857 is about 223.1894667610.

Adding to 11117857 its reverse (75871111), we get a palindrome (86988968).

The spelling of 11117857 in words is "eleven million, one hundred seventeen thousand, eight hundred fifty-seven".