209012168 has 16 divisors (see below), whose sum is σ = 404540160. Its totient is φ = 101134800.

The previous prime is 209012119. The next prime is 209012171. The reversal of 209012168 is 861210902.

It is a self number, because there is not a number n which added to its sum of digits gives 209012168.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421148 + ... + 421643.

It is an arithmetic number, because the mean of its divisors is an integer number (25283760).

Almost surely, 2^209012168 is an apocalyptic number.

It is an amenable number.

209012168 is a deficient number, since it is larger than the sum of its proper divisors (195527992).

209012168 is a wasteful number, since it uses less digits than its factorization.

209012168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842828 (or 842824 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 209012168 is about 14457.2531277556. The cubic root of 209012168 is about 593.4587306677.

The spelling of 209012168 in words is "two hundred nine million, twelve thousand, one hundred sixty-eight".