6749999 has 4 divisors (see below), whose sum is σ = 6893664. Its totient is φ = 6606336.

The previous prime is 6749989. The next prime is 6750001. The reversal of 6749999 is 9999476.

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

It is a cyclic number.

It is not a de Polignac number, because 6749999 - 2⁴ = 6749983 is a prime.

It is a Duffinian number.

6749999 is a modest number, since divided by 9999 gives 674 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 6749999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6749989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71762 + ... + 71855.

It is an arithmetic number, because the mean of its divisors is an integer number (1723416).

Almost surely, 2^6749999 is an apocalyptic number.

6749999 is a deficient number, since it is larger than the sum of its proper divisors (143665).

6749999 is a wasteful number, since it uses less digits than its factorization.

6749999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143664.

The product of its digits is 1102248, while the sum is 53.

The square root of 6749999 is about 2598.0760189032. The cubic root of 6749999 is about 188.9881481515.

The spelling of 6749999 in words is "six million, seven hundred forty-nine thousand, nine hundred ninety-nine".