6609091 has 4 divisors (see below), whose sum is σ = 6615000. Its totient is φ = 6603184.

The previous prime is 6609089. The next prime is 6609101. The reversal of 6609091 is 1909066.

It is a semiprime because it is the product of two primes, 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 6609091 - 2¹ = 6609089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6609011) 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, 706 + ... + 3703.

It is an arithmetic number, because the mean of its divisors is an integer number (1653750).

Almost surely, 2^6609091 is an apocalyptic number.

6609091 is a deficient number, since it is larger than the sum of its proper divisors (5909).

6609091 is a wasteful number, since it uses less digits than its factorization.

6609091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5908.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 6609091 is about 2570.8152403469. The cubic root of 6609091 is about 187.6638307348.

The spelling of 6609091 in words is "six million, six hundred nine thousand, ninety-one".