6418439 has 2 divisors, whose sum is σ = 6418440. Its totient is φ = 6418438.

The previous prime is 6418429. The next prime is 6418487. The reversal of 6418439 is 9348146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6418439 - 2²⁰ = 5369863 is a prime.

It is a Chen prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 6418399 and 6418408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6418429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3209219 + 3209220.

It is an arithmetic number, because the mean of its divisors is an integer number (3209220).

Almost surely, 2^6418439 is an apocalyptic number.

6418439 is a deficient number, since it is larger than the sum of its proper divisors (1).

6418439 is an equidigital number, since it uses as much as digits as its factorization.

6418439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 6418439 is about 2533.4638343580. The cubic root of 6418439 is about 185.8416870816.

The spelling of 6418439 in words is "six million, four hundred eighteen thousand, four hundred thirty-nine".