194194643 has 8 divisors (see below), whose sum is σ = 201046800. Its totient is φ = 187352928.

The previous prime is 194194639. The next prime is 194194657. The reversal of 194194643 is 346491491.

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 194194643 - 2² = 194194639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 194194643.

It is not an unprimeable number, because it can be changed into a prime (194194603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67880 + ... + 70682.

It is an arithmetic number, because the mean of its divisors is an integer number (25130850).

Almost surely, 2^194194643 is an apocalyptic number.

194194643 is a deficient number, since it is larger than the sum of its proper divisors (6852157).

194194643 is a wasteful number, since it uses less digits than its factorization.

194194643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5221.

The product of its digits is 93312, while the sum is 41.

The square root of 194194643 is about 13935.3738019473. The cubic root of 194194643 is about 579.0895774099.

The spelling of 194194643 in words is "one hundred ninety-four million, one hundred ninety-four thousand, six hundred forty-three".