11881871 has 2 divisors, whose sum is σ = 11881872. Its totient is φ = 11881870.

The previous prime is 11881867. The next prime is 11881879. The reversal of 11881871 is 17818811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11881871 - 2² = 11881867 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11881879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5940935 + 5940936.

It is an arithmetic number, because the mean of its divisors is an integer number (5940936).

Almost surely, 2^11881871 is an apocalyptic number.

11881871 is a deficient number, since it is larger than the sum of its proper divisors (1).

11881871 is an equidigital number, since it uses as much as digits as its factorization.

11881871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3584, while the sum is 35.

The square root of 11881871 is about 3447.0089933158. The cubic root of 11881871 is about 228.1891256769.

The spelling of 11881871 in words is "eleven million, eight hundred eighty-one thousand, eight hundred seventy-one".