2139873 has 8 divisors (see below), whose sum is σ = 2889600. Its totient is φ = 1408368.

The previous prime is 2139859. The next prime is 2139877. The reversal of 2139873 is 3789312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2139873 - 2⁴ = 2139857 is a prime.

It is a super-2 number, since 2×2139873² = 9158112912258, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2139877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4278 + ... + 4751.

It is an arithmetic number, because the mean of its divisors is an integer number (361200).

2^2139873 is an apocalyptic number.

It is an amenable number.

2139873 is a deficient number, since it is larger than the sum of its proper divisors (749727).

2139873 is an equidigital number, since it uses as much as digits as its factorization.

2139873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9111.

The product of its digits is 9072, while the sum is 33.

The square root of 2139873 is about 1462.8304754824. The cubic root of 2139873 is about 128.8633249879.

The spelling of 2139873 in words is "two million, one hundred thirty-nine thousand, eight hundred seventy-three".