6738709 has 4 divisors (see below), whose sum is σ = 6750316. Its totient is φ = 6727104.

The previous prime is 6738689. The next prime is 6738727. The reversal of 6738709 is 9078376.

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

It can be written as a sum of positive squares in 2 ways, for example, as 378225 + 6360484 = 615^2 + 2522^2 .

It is a cyclic number.

It is not a de Polignac number, because 6738709 - 2⁹ = 6738197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6738799) 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, 4884 + ... + 6109.

It is an arithmetic number, because the mean of its divisors is an integer number (1687579).

Almost surely, 2^6738709 is an apocalyptic number.

It is an amenable number.

6738709 is a deficient number, since it is larger than the sum of its proper divisors (11607).

6738709 is a wasteful number, since it uses less digits than its factorization.

6738709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11606.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 6738709 is about 2595.9023479322. The cubic root of 6738709 is about 188.8827226104.

It can be divided in two parts, 6738 and 709, that added together give a palindrome (7447).

The spelling of 6738709 in words is "six million, seven hundred thirty-eight thousand, seven hundred nine".