4099999 has 4 divisors (see below), whose sum is σ = 4130064. Its totient is φ = 4069936.

The previous prime is 4099981. The next prime is 4100011. The reversal of 4099999 is 9999904.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4099999 is a prime.

It is a Duffinian number.

4099999 is a modest number, since divided by 9999 gives 409 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4099699) 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, 14827 + ... + 15100.

It is an arithmetic number, because the mean of its divisors is an integer number (1032516).

Almost surely, 2^4099999 is an apocalyptic number.

4099999 is a deficient number, since it is larger than the sum of its proper divisors (30065).

4099999 is a wasteful number, since it uses less digits than its factorization.

4099999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30064.

The product of its (nonzero) digits is 236196, while the sum is 49.

The square root of 4099999 is about 2024.8454261992. The cubic root of 4099999 is about 160.0520533760.

The spelling of 4099999 in words is "four million, ninety-nine thousand, nine hundred ninety-nine".