6442279 has 2 divisors, whose sum is σ = 6442280. Its totient is φ = 6442278.

The previous prime is 6442259. The next prime is 6442283. The reversal of 6442279 is 9722446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6442279 - 2¹⁵ = 6409511 is a prime.

6442279 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6442259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3221139 + 3221140.

It is an arithmetic number, because the mean of its divisors is an integer number (3221140).

Almost surely, 2^6442279 is an apocalyptic number.

6442279 is a deficient number, since it is larger than the sum of its proper divisors (1).

6442279 is an equidigital number, since it uses as much as digits as its factorization.

6442279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 34.

The square root of 6442279 is about 2538.1644942753. The cubic root of 6442279 is about 186.0714933088.

The spelling of 6442279 in words is "six million, four hundred forty-two thousand, two hundred seventy-nine".