6438079 has 2 divisors, whose sum is σ = 6438080. Its totient is φ = 6438078.

The previous prime is 6438077. The next prime is 6438101. The reversal of 6438079 is 9708346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6438079 - 2¹ = 6438077 is a prime.

It is a super-2 number, since 2×6438079² = 82897722420482, which contains 22 as substring.

Together with 6438077, it forms a pair of twin primes.

6438079 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6438077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3219039 + 3219040.

It is an arithmetic number, because the mean of its divisors is an integer number (3219040).

Almost surely, 2^6438079 is an apocalyptic number.

6438079 is a deficient number, since it is larger than the sum of its proper divisors (1).

6438079 is an equidigital number, since it uses as much as digits as its factorization.

6438079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 6438079 is about 2537.3369898380. The cubic root of 6438079 is about 186.0310485032.

The spelling of 6438079 in words is "six million, four hundred thirty-eight thousand, seventy-nine".