2099839 has 4 divisors (see below), whose sum is σ = 2399824. Its totient is φ = 1799856.

The previous prime is 2099837. The next prime is 2099863. The reversal of 2099839 is 9389902.

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 2099839 - 2¹ = 2099837 is a prime.

2099839 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2099837) 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, 149982 + ... + 149995.

It is an arithmetic number, because the mean of its divisors is an integer number (599956).

2^2099839 is an apocalyptic number.

2099839 is a deficient number, since it is larger than the sum of its proper divisors (299985).

2099839 is an equidigital number, since it uses as much as digits as its factorization.

2099839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299984.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 2099839 is about 1449.0821232767. The cubic root of 2099839 is about 128.0546438239.

The spelling of 2099839 in words is "two million, ninety-nine thousand, eight hundred thirty-nine".