13866047 has 4 divisors (see below), whose sum is σ = 14932680. Its totient is φ = 12799416.

The previous prime is 13866043. The next prime is 13866091. The reversal of 13866047 is 74066831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74066831 = 23 ⋅3220297.

It is a cyclic number.

It is not a de Polignac number, because 13866047 - 2² = 13866043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13865998 and 13866016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13866043) 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, 533297 + ... + 533322.

It is an arithmetic number, because the mean of its divisors is an integer number (3733170).

Almost surely, 2^13866047 is an apocalyptic number.

13866047 is a deficient number, since it is larger than the sum of its proper divisors (1066633).

13866047 is a wasteful number, since it uses less digits than its factorization.

13866047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066632.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 13866047 is about 3723.7141404786. The cubic root of 13866047 is about 240.2430812611.

The spelling of 13866047 in words is "thirteen million, eight hundred sixty-six thousand, forty-seven".