11683881 has 18 divisors (see below), whose sum is σ = 18552170. Its totient is φ = 7080480.

The previous prime is 11683877. The next prime is 11683883. The reversal of 11683881 is 18838611.

It can be written as a sum of positive squares in only one way, i.e., 10890000 + 793881 = 3300^2 + 891^2 .

It is not a de Polignac number, because 11683881 - 2² = 11683877 is a prime.

It is a super-3 number, since 3×11683881³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11683883) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4276 + ... + 6453.

Almost surely, 2^11683881 is an apocalyptic number.

11683881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11683881 is a deficient number, since it is larger than the sum of its proper divisors (6868289).

11683881 is a wasteful number, since it uses less digits than its factorization.

11683881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10757 (or 10743 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 11683881 is about 3418.1692468337. The cubic root of 11683881 is about 226.9145661022.

The spelling of 11683881 in words is "eleven million, six hundred eighty-three thousand, eight hundred eighty-one".