3928039 has 2 divisors, whose sum is σ = 3928040. Its totient is φ = 3928038.

The previous prime is 3928027. The next prime is 3928049. The reversal of 3928039 is 9308293.

It is a strong prime.

It is an emirp because it is prime and its reverse (9308293) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3928039 - 2²¹ = 1830887 is a prime.

3928039 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3927995 and 3928013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3928019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1964019 + 1964020.

It is an arithmetic number, because the mean of its divisors is an integer number (1964020).

Almost surely, 2^3928039 is an apocalyptic number.

3928039 is a deficient number, since it is larger than the sum of its proper divisors (1).

3928039 is an equidigital number, since it uses as much as digits as its factorization.

3928039 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 34.

The square root of 3928039 is about 1981.9281016223. The cubic root of 3928039 is about 157.7824142693.

The spelling of 3928039 in words is "three million, nine hundred twenty-eight thousand, thirty-nine".