194009 has 4 divisors (see below), whose sum is σ = 204240. Its totient is φ = 183780.

The previous prime is 194003. The next prime is 194017. The reversal of 194009 is 900491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 194009 - 2⁴ = 193993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5087 + ... + 5124.

It is an arithmetic number, because the mean of its divisors is an integer number (51060).

2¹⁹⁴⁰⁰⁹ is an apocalyptic number.

194009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

194009 is a deficient number, since it is larger than the sum of its proper divisors (10231).

194009 is a wasteful number, since it uses less digits than its factorization.

194009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10230.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 194009 is about 440.4645275161. The cubic root of 194009 is about 57.8904989068.

The spelling of 194009 in words is "one hundred ninety-four thousand, nine".