13684969 has 4 divisors (see below), whose sum is σ = 13706896. Its totient is φ = 13663044.

The previous prime is 13684961. The next prime is 13685003. The reversal of 13684969 is 96948631.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96948631 = 13 ⋅7457587.

It is a cyclic number.

It is not a de Polignac number, because 13684969 - 2³ = 13684961 is a prime.

It is a super-2 number, since 2×13684969² = 374556753061922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13684961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9999 + ... + 11284.

It is an arithmetic number, because the mean of its divisors is an integer number (3426724).

Almost surely, 2^13684969 is an apocalyptic number.

It is an amenable number.

13684969 is a deficient number, since it is larger than the sum of its proper divisors (21927).

13684969 is an equidigital number, since it uses as much as digits as its factorization.

13684969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21926.

The product of its digits is 279936, while the sum is 46.

The square root of 13684969 is about 3699.3200726620. The cubic root of 13684969 is about 239.1927100104.

The spelling of 13684969 in words is "thirteen million, six hundred eighty-four thousand, nine hundred sixty-nine".