13973881 has 4 divisors (see below), whose sum is σ = 14795892. Its totient is φ = 13151872.

The previous prime is 13973837. The next prime is 13973887. The reversal of 13973881 is 18837931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4239481 + 9734400 = 2059^2 + 3120^2 .

It is a cyclic number.

It is not a de Polignac number, because 13973881 - 2¹⁷ = 13842809 is a prime.

It is a super-2 number, since 2×13973881² = 390538700404322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13973887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410980 + ... + 411013.

It is an arithmetic number, because the mean of its divisors is an integer number (3698973).

Almost surely, 2^13973881 is an apocalyptic number.

It is an amenable number.

13973881 is a deficient number, since it is larger than the sum of its proper divisors (822011).

13973881 is an equidigital number, since it uses as much as digits as its factorization.

13973881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822010.

The product of its digits is 36288, while the sum is 40.

The square root of 13973881 is about 3738.1654591524. The cubic root of 13973881 is about 240.8642509553.

The spelling of 13973881 in words is "thirteen million, nine hundred seventy-three thousand, eight hundred eighty-one".