8190909 has 8 divisors (see below), whose sum is σ = 12134720. Its totient is φ = 5460588.

The previous prime is 8190907. The next prime is 8190943. The reversal of 8190909 is 9090918.

It is not a de Polignac number, because 8190909 - 2¹ = 8190907 is a prime.

It is a Duffinian number.

8190909 is a modest number, since divided by 909 gives 819 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8190901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151657 + ... + 151710.

It is an arithmetic number, because the mean of its divisors is an integer number (1516840).

Almost surely, 2^8190909 is an apocalyptic number.

It is an amenable number.

8190909 is a deficient number, since it is larger than the sum of its proper divisors (3943811).

8190909 is a wasteful number, since it uses less digits than its factorization.

8190909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303376 (or 303370 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 8190909 is about 2861.9764149972. The cubic root of 8190909 is about 201.5784185373.

Subtracting 8190909 from its reverse (9090918), we obtain a palindrome (900009).

The spelling of 8190909 in words is "eight million, one hundred ninety thousand, nine hundred nine".