11917271 has 2 divisors, whose sum is σ = 11917272. Its totient is φ = 11917270.

The previous prime is 11917259. The next prime is 11917277. The reversal of 11917271 is 17271911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11917271 - 2⁶ = 11917207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11917277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5958635 + 5958636.

It is an arithmetic number, because the mean of its divisors is an integer number (5958636).

Almost surely, 2^11917271 is an apocalyptic number.

11917271 is a deficient number, since it is larger than the sum of its proper divisors (1).

11917271 is an equidigital number, since it uses as much as digits as its factorization.

11917271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882, while the sum is 29.

The square root of 11917271 is about 3452.1400608898. The cubic root of 11917271 is about 228.4155178017.

The spelling of 11917271 in words is "eleven million, nine hundred seventeen thousand, two hundred seventy-one".