194668686 has 12 divisors (see below), whose sum is σ = 421782192. Its totient is φ = 64889556.

The previous prime is 194668679. The next prime is 194668687. The reversal of 194668686 is 686866491.

194668686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194668687) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5407446 + ... + 5407481.

It is an arithmetic number, because the mean of its divisors is an integer number (35148516).

Almost surely, 2^194668686 is an apocalyptic number.

194668686 is an abundant number, since it is smaller than the sum of its proper divisors (227113506).

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

194668686 is a wasteful number, since it uses less digits than its factorization.

194668686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10814935 (or 10814932 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 54.

The square root of 194668686 is about 13952.3720563924. The cubic root of 194668686 is about 579.5603941977.

The spelling of 194668686 in words is "one hundred ninety-four million, six hundred sixty-eight thousand, six hundred eighty-six".