11171957 has 2 divisors, whose sum is σ = 11171958. Its totient is φ = 11171956.

The previous prime is 11171933. The next prime is 11171969. The reversal of 11171957 is 75917111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9897316 + 1274641 = 3146^2 + 1129^2 .

It is a cyclic number.

It is not a de Polignac number, because 11171957 - 2⁶ = 11171893 is a prime.

It is a Chen prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11171987) 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, 5585978 + 5585979.

It is an arithmetic number, because the mean of its divisors is an integer number (5585979).

Almost surely, 2^11171957 is an apocalyptic number.

It is an amenable number.

11171957 is a deficient number, since it is larger than the sum of its proper divisors (1).

11171957 is an equidigital number, since it uses as much as digits as its factorization.

11171957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2205, while the sum is 32.

The square root of 11171957 is about 3342.4477557622. The cubic root of 11171957 is about 223.5508978600.

The spelling of 11171957 in words is "eleven million, one hundred seventy-one thousand, nine hundred fifty-seven".