13923647 has 4 divisors (see below), whose sum is σ = 13936896. Its totient is φ = 13910400.

The previous prime is 13923631. The next prime is 13923649. The reversal of 13923647 is 74632931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74632931 = 19 ⋅3928049.

It is a cyclic number.

It is not a de Polignac number, because 13923647 - 2⁴ = 13923631 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 (13923649) 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, 4898 + ... + 7199.

It is an arithmetic number, because the mean of its divisors is an integer number (3484224).

Almost surely, 2^13923647 is an apocalyptic number.

13923647 is a deficient number, since it is larger than the sum of its proper divisors (13249).

13923647 is a wasteful number, since it uses less digits than its factorization.

13923647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13248.

The product of its digits is 27216, while the sum is 35.

The square root of 13923647 is about 3731.4403385288. The cubic root of 13923647 is about 240.5752808277.

The spelling of 13923647 in words is "thirteen million, nine hundred twenty-three thousand, six hundred forty-seven".