6729609 has 4 divisors (see below), whose sum is σ = 8972816. Its totient is φ = 4486404.

The previous prime is 6729607. The next prime is 6729631. The reversal of 6729609 is 9069276.

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.

It is not a de Polignac number, because 6729609 - 2¹ = 6729607 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6729607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1121599 + ... + 1121604.

It is an arithmetic number, because the mean of its divisors is an integer number (2243204).

Almost surely, 2^6729609 is an apocalyptic number.

It is an amenable number.

6729609 is a deficient number, since it is larger than the sum of its proper divisors (2243207).

6729609 is a wasteful number, since it uses less digits than its factorization.

6729609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243206.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 6729609 is about 2594.1489934081. The cubic root of 6729609 is about 188.7976614578.

The spelling of 6729609 in words is "six million, seven hundred twenty-nine thousand, six hundred nine".