6742609 has 4 divisors (see below), whose sum is σ = 6750016. Its totient is φ = 6735204.

The previous prime is 6742577. The next prime is 6742643. The reversal of 6742609 is 9062476.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6742609 - 2⁵ = 6742577 is a prime.

It is a super-2 number, since 2×6742609² = 90925552253762, which contains 22 as substring.

It is a Duffinian number.

6742609 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6742649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2109 + ... + 4234.

It is an arithmetic number, because the mean of its divisors is an integer number (1687504).

Almost surely, 2^6742609 is an apocalyptic number.

It is an amenable number.

6742609 is a deficient number, since it is larger than the sum of its proper divisors (7407).

6742609 is a wasteful number, since it uses less digits than its factorization.

6742609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7406.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 6742609 is about 2596.6534231584. The cubic root of 6742609 is about 188.9191539484.

The spelling of 6742609 in words is "six million, seven hundred forty-two thousand, six hundred nine".