13933881 has 18 divisors (see below), whose sum is σ = 21796398. Its totient is φ = 8573760.

The previous prime is 13933877. The next prime is 13933919. The reversal of 13933881 is 18833931.

It can be written as a sum of positive squares in 3 ways, for example, as 95481 + 13838400 = 309^2 + 3720^2 .

It is not a de Polignac number, because 13933881 - 2² = 13933877 is a prime.

It is a super-2 number, since 2×13933881² = 388306079444322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13933811) 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 17 ways as a sum of consecutive naturals, for example, 3060 + ... + 6101.

It is an arithmetic number, because the mean of its divisors is an integer number (1210911).

Almost surely, 2^13933881 is an apocalyptic number.

It is an amenable number.

13933881 is a deficient number, since it is larger than the sum of its proper divisors (7862517).

13933881 is a wasteful number, since it uses less digits than its factorization.

13933881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9193 (or 9177 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 13933881 is about 3732.8114069693. The cubic root of 13933881 is about 240.6342080245.

The spelling of 13933881 in words is "thirteen million, nine hundred thirty-three thousand, eight hundred eighty-one".