209994 has 16 divisors (see below), whose sum is σ = 433920. Its totient is φ = 67680.

The previous prime is 209987. The next prime is 210011. The reversal of 209994 is 499902.

It is a happy number.

It is a plaindrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 209994.

It is an unprimeable number.

209994 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379 + ... + 750.

It is an arithmetic number, because the mean of its divisors is an integer number (27120).

2²⁰⁹⁹⁹⁴ is an apocalyptic number.

209994 is an abundant number, since it is smaller than the sum of its proper divisors (223926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209994 is a wasteful number, since it uses less digits than its factorization.

209994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 209994 is about 458.2510229121. The cubic root of 209994 is about 59.4386534344.

The spelling of 209994 in words is "two hundred nine thousand, nine hundred ninety-four".