2138839 has 4 divisors (see below), whose sum is σ = 2231856. Its totient is φ = 2045824.

The previous prime is 2138833. The next prime is 2138861. The reversal of 2138839 is 9388312.

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 2138839 - 2³ = 2138831 is a prime.

It is a Duffinian number.

2138839 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138831) 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, 46474 + ... + 46519.

It is an arithmetic number, because the mean of its divisors is an integer number (557964).

2^2138839 is an apocalyptic number.

2138839 is a deficient number, since it is larger than the sum of its proper divisors (93017).

2138839 is an equidigital number, since it uses as much as digits as its factorization.

2138839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93016.

The product of its digits is 10368, while the sum is 34.

The square root of 2138839 is about 1462.4770083663. The cubic root of 2138839 is about 128.8425657893.

The spelling of 2138839 in words is "two million, one hundred thirty-eight thousand, eight hundred thirty-nine".