13921673 has 8 divisors (see below), whose sum is σ = 14436576. Its totient is φ = 13415200.

The previous prime is 13921651. The next prime is 13921679. The reversal of 13921673 is 37612931.

It is a happy number.

13921673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13921673 - 2¹⁰ = 13920649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13921679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1358 + ... + 5448.

It is an arithmetic number, because the mean of its divisors is an integer number (1804572).

Almost surely, 2^13921673 is an apocalyptic number.

It is an amenable number.

13921673 is a deficient number, since it is larger than the sum of its proper divisors (514903).

13921673 is an equidigital number, since it uses as much as digits as its factorization.

13921673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4215.

The product of its digits is 6804, while the sum is 32.

The square root of 13921673 is about 3731.1758200331. The cubic root of 13921673 is about 240.5639112479.

It can be divided in two parts, 139 and 21673, that added together give a palindrome (21812).

The spelling of 13921673 in words is "thirteen million, nine hundred twenty-one thousand, six hundred seventy-three".