194189998 has 4 divisors (see below), whose sum is σ = 291285000. Its totient is φ = 97094998.

The previous prime is 194189993. The next prime is 194190011. The reversal of 194189998 is 899981491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 899981491 = 31 ⋅29031661.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194189993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48547498 + ... + 48547501.

It is an arithmetic number, because the mean of its divisors is an integer number (72821250).

Almost surely, 2^194189998 is an apocalyptic number.

194189998 is a deficient number, since it is larger than the sum of its proper divisors (97095002).

194189998 is an equidigital number, since it uses as much as digits as its factorization.

194189998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97095001.

The product of its digits is 1679616, while the sum is 58.

The square root of 194189998 is about 13935.2071387547. The cubic root of 194189998 is about 579.0849602339.

The spelling of 194189998 in words is "one hundred ninety-four million, one hundred eighty-nine thousand, nine hundred ninety-eight".