13684805 has 4 divisors (see below), whose sum is σ = 16421772. Its totient is φ = 10947840.

The previous prime is 13684787. The next prime is 13684823. The reversal of 13684805 is 50848631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50848631 = 1627 ⋅31253.

It is an interprime number because it is at equal distance from previous prime (13684787) and next prime (13684823).

It can be written as a sum of positive squares in 2 ways, for example, as 9628609 + 4056196 = 3103^2 + 2014^2 .

It is not a de Polignac number, because 13684805 - 2¹⁶ = 13619269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1368476 + ... + 1368485.

It is an arithmetic number, because the mean of its divisors is an integer number (4105443).

Almost surely, 2^13684805 is an apocalyptic number.

It is an amenable number.

13684805 is a deficient number, since it is larger than the sum of its proper divisors (2736967).

13684805 is an equidigital number, since it uses as much as digits as its factorization.

13684805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2736966.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 13684805 is about 3699.2979063601. The cubic root of 13684805 is about 239.1917545153.

The spelling of 13684805 in words is "thirteen million, six hundred eighty-four thousand, eight hundred five".