13973281 has 12 divisors (see below), whose sum is σ = 16780800. Its totient is φ = 11589480.

The previous prime is 13973279. The next prime is 13973293. The reversal of 13973281 is 18237931.

13973281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13973281 - 2¹ = 13973279 is a prime.

It is a super-2 number, since 2×13973281² = 390505163809922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13973221) 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, 3081 + ... + 6118.

It is an arithmetic number, because the mean of its divisors is an integer number (1398400).

Almost surely, 2^13973281 is an apocalyptic number.

It is an amenable number.

13973281 is a deficient number, since it is larger than the sum of its proper divisors (2807519).

13973281 is an equidigital number, since it uses as much as digits as its factorization.

13973281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9244 (or 9237 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 13973281 is about 3738.0852050214. The cubic root of 13973281 is about 240.8608035565.

The spelling of 13973281 in words is "thirteen million, nine hundred seventy-three thousand, two hundred eighty-one".