194181089 has 8 divisors (see below), whose sum is σ = 205868160. Its totient is φ = 182523456.

The previous prime is 194181061. The next prime is 194181101. The reversal of 194181089 is 980181491.

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 194181089 - 2¹⁶ = 194115553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194180089) 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, 7052 + ... + 20930.

It is an arithmetic number, because the mean of its divisors is an integer number (25733520).

Almost surely, 2^194181089 is an apocalyptic number.

It is an amenable number.

194181089 is a deficient number, since it is larger than the sum of its proper divisors (11687071).

194181089 is a wasteful number, since it uses less digits than its factorization.

194181089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14719.

The product of its (nonzero) digits is 20736, while the sum is 41.

The square root of 194181089 is about 13934.8874771202. The cubic root of 194181089 is about 579.0761043936.

The spelling of 194181089 in words is "one hundred ninety-four million, one hundred eighty-one thousand, eighty-nine".