13923281 has 4 divisors (see below), whose sum is σ = 13935600. Its totient is φ = 13910964.

The previous prime is 13923263. The next prime is 13923307. The reversal of 13923281 is 18232931.

13923281 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13923281 - 2¹⁰ = 13922257 is a prime.

It is a super-2 number, since 2×13923281² = 387715507609922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13923241) 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 3 ways as a sum of consecutive naturals, for example, 4271 + ... + 6788.

It is an arithmetic number, because the mean of its divisors is an integer number (3483900).

Almost surely, 2^13923281 is an apocalyptic number.

It is an amenable number.

13923281 is a deficient number, since it is larger than the sum of its proper divisors (12319).

13923281 is a wasteful number, since it uses less digits than its factorization.

13923281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12318.

The product of its digits is 2592, while the sum is 29.

The square root of 13923281 is about 3731.3912954822. The cubic root of 13923281 is about 240.5731728713.

The spelling of 13923281 in words is "thirteen million, nine hundred twenty-three thousand, two hundred eighty-one".