6698909 has 4 divisors (see below), whose sum is σ = 7655904. Its totient is φ = 5741916.

The previous prime is 6698903. The next prime is 6698953. The reversal of 6698909 is 9098966.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-6698909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6698903) 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, 478487 + ... + 478500.

It is an arithmetic number, because the mean of its divisors is an integer number (1913976).

Almost surely, 2^6698909 is an apocalyptic number.

It is an amenable number.

6698909 is a deficient number, since it is larger than the sum of its proper divisors (956995).

6698909 is an equidigital number, since it uses as much as digits as its factorization.

6698909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956994.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 6698909 is about 2588.2250674932. The cubic root of 6698909 is about 188.5101299239.

The spelling of 6698909 in words is "six million, six hundred ninety-eight thousand, nine hundred nine".