40004039 has 2 divisors, whose sum is σ = 40004040. Its totient is φ = 40004038.

The previous prime is 40004023. The next prime is 40004047. The reversal of 40004039 is 93040004.

40004039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40004039 - 2⁴ = 40004023 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40004039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40004089) 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, 20002019 + 20002020.

It is an arithmetic number, because the mean of its divisors is an integer number (20002020).

Almost surely, 2^40004039 is an apocalyptic number.

40004039 is a deficient number, since it is larger than the sum of its proper divisors (1).

40004039 is an equidigital number, since it uses as much as digits as its factorization.

40004039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 40004039 is about 6324.8746232633. The cubic root of 40004039 is about 342.0066999360.

The spelling of 40004039 in words is "forty million, four thousand, thirty-nine".