4099439 has 4 divisors (see below), whose sum is σ = 4105224. Its totient is φ = 4093656.

The previous prime is 4099369. The next prime is 4099441. The reversal of 4099439 is 9349904.

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 4099439 - 2¹⁶ = 4033903 is a prime.

It is a super-2 number, since 2×4099439² = 33610800229442, which contains 22 as substring.

It is an Ulam number.

It is a deceptive number, since it divides R_4099438.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4099339) 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, 1652 + ... + 3305.

It is an arithmetic number, because the mean of its divisors is an integer number (1026306).

Almost surely, 2^4099439 is an apocalyptic number.

4099439 is a deficient number, since it is larger than the sum of its proper divisors (5785).

4099439 is an equidigital number, since it uses as much as digits as its factorization.

4099439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5784.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 4099439 is about 2024.7071393167. The cubic root of 4099439 is about 160.0447661196.

The spelling of 4099439 in words is "four million, ninety-nine thousand, four hundred thirty-nine".