13997647 has 8 divisors (see below), whose sum is σ = 15299712. Its totient is φ = 12748800.

The previous prime is 13997629. The next prime is 13997651. The reversal of 13997647 is 74679931.

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

It is a cyclic number.

It is not a de Polignac number, because 13997647 - 2⁷ = 13997519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13997597 and 13997606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13997617) 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, 12754 + ... + 13807.

It is an arithmetic number, because the mean of its divisors is an integer number (1912464).

Almost surely, 2^13997647 is an apocalyptic number.

13997647 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

13997647 is a deficient number, since it is larger than the sum of its proper divisors (1302065).

13997647 is a wasteful number, since it uses less digits than its factorization.

13997647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26609.

The product of its digits is 285768, while the sum is 46.

The square root of 13997647 is about 3741.3429407099. The cubic root of 13997647 is about 241.0007231259. Note that the first 3 decimals are identical.

The spelling of 13997647 in words is "thirteen million, nine hundred ninety-seven thousand, six hundred forty-seven".