194398939897 has 8 divisors (see below), whose sum is σ = 198926497440. Its totient is φ = 189871684800.

The previous prime is 194398939877. The next prime is 194398939901. The reversal of 194398939897 is 798939893491.

It is a happy number.

194398939897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 194398939897 - 2³⁵ = 160039201529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194398939807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1710129 + ... + 1820257.

It is an arithmetic number, because the mean of its divisors is an integer number (24865812180).

Almost surely, 2^194398939897 is an apocalyptic number.

It is an amenable number.

194398939897 is a deficient number, since it is larger than the sum of its proper divisors (4527557543).

194398939897 is a wasteful number, since it uses less digits than its factorization.

194398939897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151223.

The product of its digits is 952342272, while the sum is 79.

The spelling of 194398939897 in words is "one hundred ninety-four billion, three hundred ninety-eight million, nine hundred thirty-nine thousand, eight hundred ninety-seven".