4099959 has 18 divisors (see below), whose sum is σ = 6092528. Its totient is φ = 2656800.

The previous prime is 4099943. The next prime is 4099961. The reversal of 4099959 is 9599904.

It is a happy number.

It is not a de Polignac number, because 4099959 - 2⁴ = 4099943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4099259) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14994 + ... + 15264.

Almost surely, 2^4099959 is an apocalyptic number.

4099959 is a deficient number, since it is larger than the sum of its proper divisors (1992569).

4099959 is a wasteful number, since it uses less digits than its factorization.

4099959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 45.

The square root of 4099959 is about 2024.8355488780. The cubic root of 4099959 is about 160.0515328796.

Subtracting 4099959 from its reverse (9599904), we obtain a palindrome (5499945).

It can be divided in two parts, 40 and 99959, that added together give a palindrome (99999).

The spelling of 4099959 in words is "four million, ninety-nine thousand, nine hundred fifty-nine".