13821359 has 4 divisors (see below), whose sum is σ = 13836816. Its totient is φ = 13805904.

The previous prime is 13821343. The next prime is 13821373. The reversal of 13821359 is 95312831.

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

It is a cyclic number.

It is not a de Polignac number, because 13821359 - 2⁴ = 13821343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13821329) 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, 6299 + ... + 8204.

It is an arithmetic number, because the mean of its divisors is an integer number (3459204).

Almost surely, 2^13821359 is an apocalyptic number.

13821359 is a deficient number, since it is larger than the sum of its proper divisors (15457).

13821359 is an equidigital number, since it uses as much as digits as its factorization.

13821359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15456.

The product of its digits is 6480, while the sum is 32.

The square root of 13821359 is about 3717.7088374428. The cubic root of 13821359 is about 239.9847154618.

The spelling of 13821359 in words is "thirteen million, eight hundred twenty-one thousand, three hundred fifty-nine".