13904481 has 4 divisors (see below), whose sum is σ = 18539312. Its totient is φ = 9269652.

The previous prime is 13904479. The next prime is 13904503. The reversal of 13904481 is 18440931.

It is a happy number.

13904481 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 not a de Polignac number, because 13904481 - 2¹ = 13904479 is a prime.

It is a super-2 number, since 2×13904481² = 386669183758722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13904281) 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, 2317411 + ... + 2317416.

It is an arithmetic number, because the mean of its divisors is an integer number (4634828).

Almost surely, 2^13904481 is an apocalyptic number.

It is an amenable number.

13904481 is a deficient number, since it is larger than the sum of its proper divisors (4634831).

13904481 is an equidigital number, since it uses as much as digits as its factorization.

13904481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4634830.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 13904481 is about 3728.8712769416. The cubic root of 13904481 is about 240.4648456072.

The spelling of 13904481 in words is "thirteen million, nine hundred four thousand, four hundred eighty-one".