194104181 has 8 divisors (see below), whose sum is σ = 205754904. Its totient is φ = 182479360.

The previous prime is 194104177. The next prime is 194104189. The reversal of 194104181 is 181401491.

It can be written as a sum of positive squares in 4 ways, for example, as 99820081 + 94284100 = 9991^2 + 9710^2 .

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

It is not a de Polignac number, because 194104181 - 2² = 194104177 is a prime.

It is a super-2 number, since 2×194104181² = 75352866163361522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194104189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10211 + ... + 22191.

It is an arithmetic number, because the mean of its divisors is an integer number (25719363).

Almost surely, 2^194104181 is an apocalyptic number.

It is an amenable number.

194104181 is a deficient number, since it is larger than the sum of its proper divisors (11650723).

194104181 is a wasteful number, since it uses less digits than its factorization.

194104181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12951.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 194104181 is about 13932.1276551717. The cubic root of 194104181 is about 578.9996440370. Note that the first 3 decimals are identical.

The spelling of 194104181 in words is "one hundred ninety-four million, one hundred four thousand, one hundred eighty-one".