2099879 has 4 divisors (see below), whose sum is σ = 2118576. Its totient is φ = 2081184.

The previous prime is 2099863. The next prime is 2099887. The reversal of 2099879 is 9789902.

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 2099879 - 2⁴ = 2099863 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 (2099809) 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, 9179 + ... + 9404.

It is an arithmetic number, because the mean of its divisors is an integer number (529644).

2^2099879 is an apocalyptic number.

2099879 is a deficient number, since it is larger than the sum of its proper divisors (18697).

2099879 is a wasteful number, since it uses less digits than its factorization.

2099879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18696.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 2099879 is about 1449.0959250512. The cubic root of 2099879 is about 128.0554569264.

It can be divided in two parts, 20 and 99879, that added together give a palindrome (99899).

The spelling of 2099879 in words is "two million, ninety-nine thousand, eight hundred seventy-nine".