4000039 has 2 divisors, whose sum is σ = 4000040. Its totient is φ = 4000038.

The previous prime is 4000037. The next prime is 4000043. The reversal of 4000039 is 9300004.

4000039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4000039 - 2¹ = 4000037 is a prime.

Together with 4000037, it forms a pair of twin primes.

4000039 is a modest number, since divided by 39 gives 4 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 3999986 and 4000031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4000037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000019 + 2000020.

It is an arithmetic number, because the mean of its divisors is an integer number (2000020).

Almost surely, 2^4000039 is an apocalyptic number.

4000039 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000039 is an equidigital number, since it uses as much as digits as its factorization.

4000039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 4000039 is about 2000.0097499762. The cubic root of 4000039 is about 158.7406211005.

The spelling of 4000039 in words is "four million, thirty-nine", and thus it is an aban number.