4004000999 has 2 divisors, whose sum is σ = 4004001000. Its totient is φ = 4004000998.

The previous prime is 4004000989. The next prime is 4004001047. The reversal of 4004000999 is 9990004004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4004000999 - 2⁸ = 4004000743 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4004000989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2002000499 + 2002000500.

It is an arithmetic number, because the mean of its divisors is an integer number (2002000500).

Almost surely, 2^4004000999 is an apocalyptic number.

4004000999 is a deficient number, since it is larger than the sum of its proper divisors (1).

4004000999 is an equidigital number, since it uses as much as digits as its factorization.

4004000999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 4004000999 is about 63277.1759720675. The cubic root of 4004000999 is about 1587.9301414353.

The spelling of 4004000999 in words is "four billion, four million, nine hundred ninety-nine", and thus it is an aban number.