4089999 has 4 divisors (see below), whose sum is σ = 5453336. Its totient is φ = 2726664.

The previous prime is 4089973. The next prime is 4090001. The reversal of 4089999 is 9999804.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4089999 - 2⁷ = 4089871 is a prime.

It is a D-number.

It is a Duffinian number.

4089999 is a modest number, since divided by 9999 gives 408 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4089949) 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, 681664 + ... + 681669.

It is an arithmetic number, because the mean of its divisors is an integer number (1363334).

Almost surely, 2^4089999 is an apocalyptic number.

4089999 is a deficient number, since it is larger than the sum of its proper divisors (1363337).

4089999 is a wasteful number, since it uses less digits than its factorization.

4089999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363336.

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 4089999 is about 2022.3745943816. The cubic root of 4089999 is about 159.9218237884.

The spelling of 4089999 in words is "four million, eighty-nine thousand, nine hundred ninety-nine".