13678247 has 4 divisors (see below), whose sum is σ = 14921736. Its totient is φ = 12434760.

The previous prime is 13678243. The next prime is 13678253. The reversal of 13678247 is 74287631.

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

It is a cyclic number.

It is not a de Polignac number, because 13678247 - 2² = 13678243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13678247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13678241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621728 + ... + 621749.

It is an arithmetic number, because the mean of its divisors is an integer number (3730434).

Almost surely, 2^13678247 is an apocalyptic number.

13678247 is a deficient number, since it is larger than the sum of its proper divisors (1243489).

13678247 is a wasteful number, since it uses less digits than its factorization.

13678247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243488.

The product of its digits is 56448, while the sum is 38.

The square root of 13678247 is about 3698.4114157297. The cubic root of 13678247 is about 239.1535401074.

The spelling of 13678247 in words is "thirteen million, six hundred seventy-eight thousand, two hundred forty-seven".