6347639 has 2 divisors, whose sum is σ = 6347640. Its totient is φ = 6347638.

The previous prime is 6347623. The next prime is 6347641. The reversal of 6347639 is 9367436.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6347639 - 2⁴ = 6347623 is a prime.

Together with 6347641, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6347659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3173819 + 3173820.

It is an arithmetic number, because the mean of its divisors is an integer number (3173820).

Almost surely, 2^6347639 is an apocalyptic number.

6347639 is a deficient number, since it is larger than the sum of its proper divisors (1).

6347639 is an equidigital number, since it uses as much as digits as its factorization.

6347639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 38.

The square root of 6347639 is about 2519.4521229823. The cubic root of 6347639 is about 185.1558365525.

The spelling of 6347639 in words is "six million, three hundred forty-seven thousand, six hundred thirty-nine".