2139843 has 4 divisors (see below), whose sum is σ = 2853128. Its totient is φ = 1426560.

The previous prime is 2139829. The next prime is 2139857. The reversal of 2139843 is 3489312.

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 (2139829) and next prime (2139857).

It is not a de Polignac number, because 2139843 - 2⁵ = 2139811 is a prime.

It is a D-number.

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 2139843.

It is not an unprimeable number, because it can be changed into a prime (2139043) 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, 356638 + ... + 356643.

It is an arithmetic number, because the mean of its divisors is an integer number (713282).

2^2139843 is an apocalyptic number.

2139843 is a deficient number, since it is larger than the sum of its proper divisors (713285).

2139843 is an equidigital number, since it uses as much as digits as its factorization.

2139843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713284.

The product of its digits is 5184, while the sum is 30.

The square root of 2139843 is about 1462.8202213533. The cubic root of 2139843 is about 128.8627227843.

The spelling of 2139843 in words is "two million, one hundred thirty-nine thousand, eight hundred forty-three".