6390239 has 2 divisors, whose sum is σ = 6390240. Its totient is φ = 6390238.

The previous prime is 6390227. The next prime is 6390257. The reversal of 6390239 is 9320936.

6390239 is digitally balanced in base 3, 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 6390239 - 2⁸ = 6389983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6395239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3195119 + 3195120.

It is an arithmetic number, because the mean of its divisors is an integer number (3195120).

Almost surely, 2^6390239 is an apocalyptic number.

6390239 is a deficient number, since it is larger than the sum of its proper divisors (1).

6390239 is an equidigital number, since it uses as much as digits as its factorization.

6390239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 6390239 is about 2527.8922049803. The cubic root of 6390239 is about 185.5691166751.

The spelling of 6390239 in words is "six million, three hundred ninety thousand, two hundred thirty-nine".