2099999 has 4 divisors (see below), whose sum is σ = 2290920. Its totient is φ = 1909080.

The previous prime is 2099963. The next prime is 2100001. The reversal of 2099999 is 9999902.

It is a happy number.

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 2099999 - 2⁸ = 2099743 is a prime.

It is a Duffinian number.

2099999 is a modest number, since divided by 9999 gives 209 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2099939) 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, 95444 + ... + 95465.

It is an arithmetic number, because the mean of its divisors is an integer number (572730).

2^2099999 is an apocalyptic number.

2099999 is a deficient number, since it is larger than the sum of its proper divisors (190921).

2099999 is a wasteful number, since it uses less digits than its factorization.

2099999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190920.

The product of its (nonzero) digits is 118098, while the sum is 47.

The square root of 2099999 is about 1449.1373295861. The cubic root of 2099999 is about 128.0578961721.

The spelling of 2099999 in words is "two million, ninety-nine thousand, nine hundred ninety-nine".