4139863 has 24 divisors (see below), whose sum is σ = 5317872. Its totient is φ = 3193344.

The previous prime is 4139831. The next prime is 4139873. The reversal of 4139863 is 3689314.

It is not a de Polignac number, because 4139863 - 2⁵ = 4139831 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4139803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42631 + ... + 42727.

It is an arithmetic number, because the mean of its divisors is an integer number (221578).

Almost surely, 2^4139863 is an apocalyptic number.

4139863 is a deficient number, since it is larger than the sum of its proper divisors (1178009).

4139863 is a wasteful number, since it uses less digits than its factorization.

4139863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 184 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 4139863 is about 2034.6653287457. The cubic root of 4139863 is about 160.5691061511.

The spelling of 4139863 in words is "four million, one hundred thirty-nine thousand, eight hundred sixty-three".