194655989 has 8 divisors (see below), whose sum is σ = 212902560. Its totient is φ = 176501200.

The previous prime is 194655983. The next prime is 194655991. The reversal of 194655989 is 989556491.

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 194655989 - 2⁴ = 194655973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194655983) 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, 18467 + ... + 27024.

It is an arithmetic number, because the mean of its divisors is an integer number (26612820).

Almost surely, 2^194655989 is an apocalyptic number.

It is an amenable number.

194655989 is a deficient number, since it is larger than the sum of its proper divisors (18246571).

194655989 is a wasteful number, since it uses less digits than its factorization.

194655989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45891.

The product of its digits is 3499200, while the sum is 56.

The square root of 194655989 is about 13951.9170367373. The cubic root of 194655989 is about 579.5477935778.

The spelling of 194655989 in words is "one hundred ninety-four million, six hundred fifty-five thousand, nine hundred eighty-nine".