13857863 has 4 divisors (see below), whose sum is σ = 13866048. Its totient is φ = 13849680.

The previous prime is 13857841. The next prime is 13857871. The reversal of 13857863 is 36875831.

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, and also an emirpimes, since its reverse is a distinct semiprime: 36875831 = 23 ⋅1603297.

It is a cyclic number.

It is not a de Polignac number, because 13857863 - 2⁸ = 13857607 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 13857863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13857803) 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, 503 + ... + 5288.

It is an arithmetic number, because the mean of its divisors is an integer number (3466512).

Almost surely, 2^13857863 is an apocalyptic number.

13857863 is a deficient number, since it is larger than the sum of its proper divisors (8185).

13857863 is an equidigital number, since it uses as much as digits as its factorization.

13857863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8184.

The product of its digits is 120960, while the sum is 41.

The square root of 13857863 is about 3722.6150754544. The cubic root of 13857863 is about 240.1958066407.

The spelling of 13857863 in words is "thirteen million, eight hundred fifty-seven thousand, eight hundred sixty-three".