11986911 has 12 divisors (see below), whose sum is σ = 17346888. Its totient is φ = 7976304.

The previous prime is 11986879. The next prime is 11986913. The reversal of 11986911 is 11968911.

It is not a de Polignac number, because 11986911 - 2⁵ = 11986879 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11986913) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6096 + ... + 7818.

It is an arithmetic number, because the mean of its divisors is an integer number (1445574).

Almost surely, 2^11986911 is an apocalyptic number.

11986911 is a deficient number, since it is larger than the sum of its proper divisors (5359977).

11986911 is a wasteful number, since it uses less digits than its factorization.

11986911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502 (or 2499 counting only the distinct ones).

The product of its digits is 3888, while the sum is 36.

The square root of 11986911 is about 3462.2118652676. The cubic root of 11986911 is about 228.8595784237.

The spelling of 11986911 in words is "eleven million, nine hundred eighty-six thousand, nine hundred eleven".