9940039 has 2 divisors, whose sum is σ = 9940040. Its totient is φ = 9940038.

The previous prime is 9940031. The next prime is 9940043. The reversal of 9940039 is 9300499.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9940039 - 2³ = 9940031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9939986 and 9940013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9940031) 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, 4970019 + 4970020.

It is an arithmetic number, because the mean of its divisors is an integer number (4970020).

Almost surely, 2^9940039 is an apocalyptic number.

9940039 is a deficient number, since it is larger than the sum of its proper divisors (1).

9940039 is an equidigital number, since it uses as much as digits as its factorization.

9940039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 9940039 is about 3152.7827391052. The cubic root of 9940039 is about 215.0119986093.

The spelling of 9940039 in words is "nine million, nine hundred forty thousand, thirty-nine".