2101879 has 4 divisors (see below), whose sum is σ = 2263576. Its totient is φ = 1940184.

The previous prime is 2101873. The next prime is 2101903. The reversal of 2101879 is 9781012.

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 2101879 - 2³ = 2101871 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 (2101871) 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, 80829 + ... + 80854.

It is an arithmetic number, because the mean of its divisors is an integer number (565894).

2^2101879 is an apocalyptic number.

2101879 is a deficient number, since it is larger than the sum of its proper divisors (161697).

2101879 is a wasteful number, since it uses less digits than its factorization.

2101879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161696.

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 2101879 is about 1449.7858462545. The cubic root of 2101879 is about 128.0960988947.

The spelling of 2101879 in words is "two million, one hundred one thousand, eight hundred seventy-nine".