8190209 has 16 divisors (see below), whose sum is σ = 9234000. Its totient is φ = 7225344.

The previous prime is 8190187. The next prime is 8190211. The reversal of 8190209 is 9020918.

It can be written as a sum of positive squares in 8 ways, for example, as 1507984 + 6682225 = 1228^2 + 2585^2 .

It is a cyclic number.

It is not a de Polignac number, because 8190209 - 2¹⁶ = 8124673 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8190509) 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, 18017 + ... + 18465.

It is an arithmetic number, because the mean of its divisors is an integer number (577125).

Almost surely, 2^8190209 is an apocalyptic number.

It is an amenable number.

8190209 is a deficient number, since it is larger than the sum of its proper divisors (1043791).

8190209 is a wasteful number, since it uses less digits than its factorization.

8190209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 8190209 is about 2861.8541192730. The cubic root of 8190209 is about 201.5726760361.

The spelling of 8190209 in words is "eight million, one hundred ninety thousand, two hundred nine".