4008999 has 4 divisors (see below), whose sum is σ = 5345336. Its totient is φ = 2672664.

The previous prime is 4008997. The next prime is 4009001. The reversal of 4008999 is 9998004.

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

It is an interprime number because it is at equal distance from previous prime (4008997) and next prime (4009001).

It is not a de Polignac number, because 4008999 - 2¹ = 4008997 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4008997) 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, 668164 + ... + 668169.

It is an arithmetic number, because the mean of its divisors is an integer number (1336334).

Almost surely, 2^4008999 is an apocalyptic number.

4008999 is a deficient number, since it is larger than the sum of its proper divisors (1336337).

4008999 is a wasteful number, since it uses less digits than its factorization.

4008999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336336.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 4008999 is about 2002.2484860776. The cubic root of 4008999 is about 158.8590578873.

The spelling of 4008999 in words is "four million, eight thousand, nine hundred ninety-nine".