2138863 has 4 divisors (see below), whose sum is σ = 2188648. Its totient is φ = 2089080.

The previous prime is 2138861. The next prime is 2138867. The reversal of 2138863 is 3688312.

2138863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2138863 - 2¹ = 2138861 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 (2138861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24828 + ... + 24913.

It is an arithmetic number, because the mean of its divisors is an integer number (547162).

2^2138863 is an apocalyptic number.

2138863 is a deficient number, since it is larger than the sum of its proper divisors (49785).

2138863 is an equidigital number, since it uses as much as digits as its factorization.

2138863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49784.

The product of its digits is 6912, while the sum is 31.

The square root of 2138863 is about 1462.4852136005. The cubic root of 2138863 is about 128.8430477034.

The spelling of 2138863 in words is "two million, one hundred thirty-eight thousand, eight hundred sixty-three".