6742909 has 4 divisors (see below), whose sum is σ = 6769404. Its totient is φ = 6716416.

The previous prime is 6742889. The next prime is 6742913. The reversal of 6742909 is 9092476.

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 4214809 + 2528100 = 2053^2 + 1590^2 .

It is a cyclic number.

It is not a de Polignac number, because 6742909 - 2⁷ = 6742781 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6742969) 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, 12862 + ... + 13375.

It is an arithmetic number, because the mean of its divisors is an integer number (1692351).

Almost surely, 2^6742909 is an apocalyptic number.

It is an amenable number.

6742909 is a deficient number, since it is larger than the sum of its proper divisors (26495).

6742909 is a wasteful number, since it uses less digits than its factorization.

6742909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26494.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 6742909 is about 2596.7111891776. The cubic root of 6742909 is about 188.9219557770.

The spelling of 6742909 in words is "six million, seven hundred forty-two thousand, nine hundred nine".