13992647 has 4 divisors (see below), whose sum is σ = 14001480. Its totient is φ = 13983816.

The previous prime is 13992637. The next prime is 13992731. The reversal of 13992647 is 74629931.

13992647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13992647 - 2⁴ = 13992631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13992637) 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, 1313 + ... + 5450.

It is an arithmetic number, because the mean of its divisors is an integer number (3500370).

Almost surely, 2^13992647 is an apocalyptic number.

13992647 is a deficient number, since it is larger than the sum of its proper divisors (8833).

13992647 is an equidigital number, since it uses as much as digits as its factorization.

13992647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8832.

The product of its digits is 81648, while the sum is 41.

The square root of 13992647 is about 3740.6746717671. The cubic root of 13992647 is about 240.9720243234.

The spelling of 13992647 in words is "thirteen million, nine hundred ninety-two thousand, six hundred forty-seven".