13875643 has 4 divisors (see below), whose sum is σ = 14605960. Its totient is φ = 13145328.

The previous prime is 13875637. The next prime is 13875649. The reversal of 13875643 is 34657831.

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

It is an interprime number because it is at equal distance from previous prime (13875637) and next prime (13875649).

It is a cyclic number.

It is not a de Polignac number, because 13875643 - 2⁵ = 13875611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13875649) 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, 365130 + ... + 365167.

It is an arithmetic number, because the mean of its divisors is an integer number (3651490).

Almost surely, 2^13875643 is an apocalyptic number.

13875643 is a deficient number, since it is larger than the sum of its proper divisors (730317).

13875643 is an equidigital number, since it uses as much as digits as its factorization.

13875643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730316.

The product of its digits is 60480, while the sum is 37.

The square root of 13875643 is about 3725.0024161066. The cubic root of 13875643 is about 240.2984885689.

The spelling of 13875643 in words is "thirteen million, eight hundred seventy-five thousand, six hundred forty-three".