6339999 has 4 divisors (see below), whose sum is σ = 8453336. Its totient is φ = 4226664.

The previous prime is 6339989. The next prime is 6340013. The reversal of 6339999 is 9999336.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6339999 - 2²⁰ = 5291423 is a prime.

It is a D-number.

It is a Duffinian number.

6339999 is a modest number, since divided by 9999 gives 633 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6339919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056664 + ... + 1056669.

It is an arithmetic number, because the mean of its divisors is an integer number (2113334).

Almost surely, 2^6339999 is an apocalyptic number.

6339999 is a deficient number, since it is larger than the sum of its proper divisors (2113337).

6339999 is a wasteful number, since it uses less digits than its factorization.

6339999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113336.

The product of its digits is 354294, while the sum is 48.

The square root of 6339999 is about 2517.9354638275. The cubic root of 6339999 is about 185.0815223860.

The spelling of 6339999 in words is "six million, three hundred thirty-nine thousand, nine hundred ninety-nine".