8490909 has 16 divisors (see below), whose sum is σ = 13240832. Its totient is φ = 4738608.

The previous prime is 8490901. The next prime is 8490913. The reversal of 8490909 is 9090948.

8490909 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8490909 - 2³ = 8490901 is a prime.

It is an Ulam number.

It is a Duffinian number.

8490909 is a modest number, since divided by 909 gives 849 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8490901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3799 + ... + 5604.

It is an arithmetic number, because the mean of its divisors is an integer number (827552).

Almost surely, 2^8490909 is an apocalyptic number.

It is an amenable number.

8490909 is a deficient number, since it is larger than the sum of its proper divisors (4749923).

8490909 is a wasteful number, since it uses less digits than its factorization.

8490909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9456.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 8490909 is about 2913.9164366879. The cubic root of 8490909 is about 204.0099716387.

Adding to 8490909 its sum of digits (39), we get a palindrome (8490948).

The spelling of 8490909 in words is "eight million, four hundred ninety thousand, nine hundred nine".