194970209 has 8 divisors (see below), whose sum is σ = 222940608. Its totient is φ = 167029200.

The previous prime is 194970203. The next prime is 194970233. The reversal of 194970209 is 902079491.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194970209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194970203) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9434 + ... + 21884.

It is an arithmetic number, because the mean of its divisors is an integer number (27867576).

Almost surely, 2^194970209 is an apocalyptic number.

It is an amenable number.

194970209 is a deficient number, since it is larger than the sum of its proper divisors (27970399).

194970209 is a wasteful number, since it uses less digits than its factorization.

194970209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14695.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 194970209 is about 13963.1733141145. The cubic root of 194970209 is about 579.8594675375.

The spelling of 194970209 in words is "one hundred ninety-four million, nine hundred seventy thousand, two hundred nine".