6725809 has 4 divisors (see below), whose sum is σ = 6738160. Its totient is φ = 6713460.

The previous prime is 6725743. The next prime is 6725827. The reversal of 6725809 is 9085276.

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 a cyclic number.

It is not a de Polignac number, because 6725809 - 2¹⁹ = 6201521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6725839) 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, 5319 + ... + 6460.

It is an arithmetic number, because the mean of its divisors is an integer number (1684540).

Almost surely, 2^6725809 is an apocalyptic number.

It is an amenable number.

6725809 is a deficient number, since it is larger than the sum of its proper divisors (12351).

6725809 is a wasteful number, since it uses less digits than its factorization.

6725809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12350.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 6725809 is about 2593.4164725319. The cubic root of 6725809 is about 188.7621187196.

The spelling of 6725809 in words is "six million, seven hundred twenty-five thousand, eight hundred nine".