2089999 has 4 divisors (see below), whose sum is σ = 2092936. Its totient is φ = 2087064.

The previous prime is 2089979. The next prime is 2090003. The reversal of 2089999 is 9999802.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2089999 is a prime.

It is a Duffinian number.

2089999 is a modest number, since divided by 9999 gives 208 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2089939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 352 + ... + 2074.

It is an arithmetic number, because the mean of its divisors is an integer number (523234).

2^2089999 is an apocalyptic number.

2089999 is a deficient number, since it is larger than the sum of its proper divisors (2937).

2089999 is a wasteful number, since it uses less digits than its factorization.

2089999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936.

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 2089999 is about 1445.6828836228. The cubic root of 2089999 is about 127.8543060716.

The spelling of 2089999 in words is "two million, eighty-nine thousand, nine hundred ninety-nine".