13680347 has 4 divisors (see below), whose sum is σ = 14014056. Its totient is φ = 13346640.

The previous prime is 13680341. The next prime is 13680353. The reversal of 13680347 is 74308631.

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

It is an interprime number because it is at equal distance from previous prime (13680341) and next prime (13680353).

It is a cyclic number.

It is not a de Polignac number, because 13680347 - 2¹² = 13676251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13680341) 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, 166793 + ... + 166874.

It is an arithmetic number, because the mean of its divisors is an integer number (3503514).

Almost surely, 2^13680347 is an apocalyptic number.

13680347 is a deficient number, since it is larger than the sum of its proper divisors (333709).

13680347 is an equidigital number, since it uses as much as digits as its factorization.

13680347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333708.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 13680347 is about 3698.6953105115. The cubic root of 13680347 is about 239.1657784382.

Adding to 13680347 its reverse (74308631), we get a palindrome (87988978).

The spelling of 13680347 in words is "thirteen million, six hundred eighty thousand, three hundred forty-seven".