6749539 has 4 divisors (see below), whose sum is σ = 6767280. Its totient is φ = 6731800.

The previous prime is 6749531. The next prime is 6749563. The reversal of 6749539 is 9359476.

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 6749539 - 2³ = 6749531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6749495 and 6749504.

It is not an unprimeable number, because it can be changed into a prime (6749531) 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, 8287 + ... + 9064.

It is an arithmetic number, because the mean of its divisors is an integer number (1691820).

Almost surely, 2^6749539 is an apocalyptic number.

6749539 is a deficient number, since it is larger than the sum of its proper divisors (17741).

6749539 is a wasteful number, since it uses less digits than its factorization.

6749539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17740.

The product of its digits is 204120, while the sum is 43.

The square root of 6749539 is about 2597.9874903471. The cubic root of 6749539 is about 188.9838549892.

The spelling of 6749539 in words is "six million, seven hundred forty-nine thousand, five hundred thirty-nine".