11181969 has 20 divisors (see below), whose sum is σ = 16850944. Its totient is φ = 7389144.

The previous prime is 11181959. The next prime is 11181991. The reversal of 11181969 is 96918111.

It is not a de Polignac number, because 11181969 - 2⁴ = 11181953 is a prime.

It is a super-2 number, since 2×11181969² = 250072861433922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11181949) 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 in 19 ways as a sum of consecutive naturals, for example, 9744 + ... + 10830.

Almost surely, 2^11181969 is an apocalyptic number.

It is an amenable number.

11181969 is a deficient number, since it is larger than the sum of its proper divisors (5668975).

11181969 is a wasteful number, since it uses less digits than its factorization.

11181969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226 (or 1217 counting only the distinct ones).

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

The square root of 11181969 is about 3343.9451251478. The cubic root of 11181969 is about 223.6176579725.

The spelling of 11181969 in words is "eleven million, one hundred eighty-one thousand, nine hundred sixty-nine".