194991108 has 24 divisors (see below), whose sum is σ = 489978048. Its totient is φ = 59997216.

The previous prime is 194991089. The next prime is 194991113. The reversal of 194991108 is 801199491.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 194991108.

It is an unprimeable number.

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, 624816 + ... + 625127.

It is an arithmetic number, because the mean of its divisors is an integer number (20415752).

Almost surely, 2^194991108 is an apocalyptic number.

It is an amenable number.

194991108 is an abundant number, since it is smaller than the sum of its proper divisors (294986940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

194991108 is a wasteful number, since it uses less digits than its factorization.

194991108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249963 (or 1249961 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 42.

The square root of 194991108 is about 13963.9216554663. The cubic root of 194991108 is about 579.8801853181.

The spelling of 194991108 in words is "one hundred ninety-four million, nine hundred ninety-one thousand, one hundred eight".