13869447 has 8 divisors (see below), whose sum is σ = 18665856. Its totient is φ = 9159672.

The previous prime is 13869419. The next prime is 13869451. The reversal of 13869447 is 74496831.

13869447 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13869447 - 2¹² = 13865351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13869399 and 13869408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13869407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21283 + ... + 21924.

It is an arithmetic number, because the mean of its divisors is an integer number (2333232).

Almost surely, 2^13869447 is an apocalyptic number.

13869447 is a deficient number, since it is larger than the sum of its proper divisors (4796409).

13869447 is a wasteful number, since it uses less digits than its factorization.

13869447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43317.

The product of its digits is 145152, while the sum is 42.

The square root of 13869447 is about 3724.1706459291. The cubic root of 13869447 is about 240.2627157857.

The spelling of 13869447 in words is "thirteen million, eight hundred sixty-nine thousand, four hundred forty-seven".