3920239 has 2 divisors, whose sum is σ = 3920240. Its totient is φ = 3920238.

The previous prime is 3920233. The next prime is 3920243. The reversal of 3920239 is 9320293.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3920239 is a prime.

3920239 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3920233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1960119 + 1960120.

It is an arithmetic number, because the mean of its divisors is an integer number (1960120).

Almost surely, 2^3920239 is an apocalyptic number.

3920239 is a deficient number, since it is larger than the sum of its proper divisors (1).

3920239 is an equidigital number, since it uses as much as digits as its factorization.

3920239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 3920239 is about 1979.9593430169. The cubic root of 3920239 is about 157.6779076404.

The spelling of 3920239 in words is "three million, nine hundred twenty thousand, two hundred thirty-nine".