4007999 has 2 divisors, whose sum is σ = 4008000. Its totient is φ = 4007998.

The previous prime is 4007981. The next prime is 4008001. The reversal of 4007999 is 9997004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4007999 is a prime.

Together with 4008001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4007099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2003999 + 2004000.

It is an arithmetic number, because the mean of its divisors is an integer number (2004000).

Almost surely, 2^4007999 is an apocalyptic number.

4007999 is a deficient number, since it is larger than the sum of its proper divisors (1).

4007999 is an equidigital number, since it uses as much as digits as its factorization.

4007999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 4007999 is about 2001.9987512484. The cubic root of 4007999 is about 158.8458482500.

The spelling of 4007999 in words is "four million, seven thousand, nine hundred ninety-nine".