194408243 has 8 divisors (see below), whose sum is σ = 206041968. Its totient is φ = 182796544.

The previous prime is 194408239. The next prime is 194408261. The reversal of 194408243 is 342804491.

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 194408243 - 2² = 194408239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194408143) 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, 14855 + ... + 24687.

It is an arithmetic number, because the mean of its divisors is an integer number (25755246).

Almost surely, 2^194408243 is an apocalyptic number.

194408243 is a deficient number, since it is larger than the sum of its proper divisors (11633725).

194408243 is a wasteful number, since it uses less digits than its factorization.

194408243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11013.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 194408243 is about 13943.0356450810. The cubic root of 194408243 is about 579.3018184347.

The spelling of 194408243 in words is "one hundred ninety-four million, four hundred eight thousand, two hundred forty-three".