194638243 has 8 divisors (see below), whose sum is σ = 202798080. Its totient is φ = 186596040.

The previous prime is 194638217. The next prime is 194638267. The reversal of 194638243 is 342836491.

It is a happy number.

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 194638243 - 2⁹ = 194637731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194638196 and 194638205.

It is not an unprimeable number, because it can be changed into a prime (194638273) 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, 26023 + ... + 32656.

It is an arithmetic number, because the mean of its divisors is an integer number (25349760).

Almost surely, 2^194638243 is an apocalyptic number.

194638243 is a deficient number, since it is larger than the sum of its proper divisors (8159837).

194638243 is a wasteful number, since it uses less digits than its factorization.

194638243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58817.

The product of its digits is 124416, while the sum is 40.

The square root of 194638243 is about 13951.2810522905. The cubic root of 194638243 is about 579.5301813657.

The spelling of 194638243 in words is "one hundred ninety-four million, six hundred thirty-eight thousand, two hundred forty-three".