8689909 has 4 divisors (see below), whose sum is σ = 8901900. Its totient is φ = 8477920.

The previous prime is 8689853. The next prime is 8689943. The reversal of 8689909 is 9099868.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3073009 + 5616900 = 1753^2 + 2370^2 .

It is a cyclic number.

It is not a de Polignac number, because 8689909 - 2²¹ = 6592757 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 (8689949) 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, 105934 + ... + 106015.

It is an arithmetic number, because the mean of its divisors is an integer number (2225475).

Almost surely, 2^8689909 is an apocalyptic number.

It is an amenable number.

8689909 is a deficient number, since it is larger than the sum of its proper divisors (211991).

8689909 is a wasteful number, since it uses less digits than its factorization.

8689909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211990.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 8689909 is about 2947.8651597385. The cubic root of 8689909 is about 205.5914626124.

The spelling of 8689909 in words is "eight million, six hundred eighty-nine thousand, nine hundred nine".