194166197 has 8 divisors (see below), whose sum is σ = 206334936. Its totient is φ = 182080512.

The previous prime is 194166157. The next prime is 194166241. The reversal of 194166197 is 791661491.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17648401 + 176517796 = 4201^2 + 13286^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 194166197 - 2²⁰ = 193117621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194166157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15908 + ... + 25325.

It is an arithmetic number, because the mean of its divisors is an integer number (25791867).

Almost surely, 2^194166197 is an apocalyptic number.

194166197 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

194166197 is a deficient number, since it is larger than the sum of its proper divisors (12168739).

194166197 is a wasteful number, since it uses less digits than its factorization.

194166197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41527.

The product of its digits is 81648, while the sum is 44.

The square root of 194166197 is about 13934.3531245623. The cubic root of 194166197 is about 579.0613006489.

The spelling of 194166197 in words is "one hundred ninety-four million, one hundred sixty-six thousand, one hundred ninety-seven".