13859806 has 4 divisors (see below), whose sum is σ = 20789712. Its totient is φ = 6929902.

The previous prime is 13859771. The next prime is 13859809. The reversal of 13859806 is 60895831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60895831 = 67 ⋅908893.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13859809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3464950 + ... + 3464953.

It is an arithmetic number, because the mean of its divisors is an integer number (5197428).

Almost surely, 2^13859806 is an apocalyptic number.

13859806 is a deficient number, since it is larger than the sum of its proper divisors (6929906).

13859806 is an equidigital number, since it uses as much as digits as its factorization.

13859806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6929905.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 13859806 is about 3722.8760387636. The cubic root of 13859806 is about 240.2070320041.

The spelling of 13859806 in words is "thirteen million, eight hundred fifty-nine thousand, eight hundred six".