209164 has 6 divisors (see below), whose sum is σ = 366044. Its totient is φ = 104580.

The previous prime is 209159. The next prime is 209173. The reversal of 209164 is 461902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26142 + ... + 26149.

2²⁰⁹¹⁶⁴ is an apocalyptic number.

It is an amenable number.

209164 is a deficient number, since it is larger than the sum of its proper divisors (156880).

209164 is a wasteful number, since it uses less digits than its factorization.

209164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52295 (or 52293 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 209164 is about 457.3445090957. The cubic root of 209164 is about 59.3602397290.

It can be divided in two parts, 209 and 164, that added together give a palindrome (373).

The spelling of 209164 in words is "two hundred nine thousand, one hundred sixty-four".