209085164 has 12 divisors (see below), whose sum is σ = 366735600. Its totient is φ = 104303568.

The previous prime is 209085133. The next prime is 209085179. The reversal of 209085164 is 461580902.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57779 + ... + 61290.

It is an arithmetic number, because the mean of its divisors is an integer number (30561300).

Almost surely, 2^209085164 is an apocalyptic number.

It is an amenable number.

209085164 is a deficient number, since it is larger than the sum of its proper divisors (157650436).

209085164 is a wasteful number, since it uses less digits than its factorization.

209085164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119512 (or 119510 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 209085164 is about 14459.7774533359. Note that the first 3 decimals coincide. The cubic root of 209085164 is about 593.5278096944.

The spelling of 209085164 in words is "two hundred nine million, eighty-five thousand, one hundred sixty-four".