6739999 has 12 divisors (see below), whose sum is σ = 7961304. Its totient is φ = 5688144.

The previous prime is 6739987. The next prime is 6740021. The reversal of 6739999 is 9999376.

It is not a de Polignac number, because 6739999 - 2⁹ = 6739487 is a prime.

It is a Duffinian number.

6739999 is a modest number, since divided by 9999 gives 673 as remainder.

6739999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6739969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2257 + ... + 4309.

It is an arithmetic number, because the mean of its divisors is an integer number (663442).

Almost surely, 2^6739999 is an apocalyptic number.

6739999 is a deficient number, since it is larger than the sum of its proper divisors (1221305).

6739999 is a wasteful number, since it uses less digits than its factorization.

6739999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134 (or 2127 counting only the distinct ones).

The product of its digits is 826686, while the sum is 52.

The square root of 6739999 is about 2596.1508045566. The cubic root of 6739999 is about 188.8947745315.

The spelling of 6739999 in words is "six million, seven hundred thirty-nine thousand, nine hundred ninety-nine".