194198399 has 4 divisors (see below), whose sum is σ = 194236536. Its totient is φ = 194160264.

The previous prime is 194198393. The next prime is 194198401. The reversal of 194198399 is 993891491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 194198399 - 2⁴ = 194198383 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 194198399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194198393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9989 + ... + 22094.

It is an arithmetic number, because the mean of its divisors is an integer number (48559134).

Almost surely, 2^194198399 is an apocalyptic number.

194198399 is a deficient number, since it is larger than the sum of its proper divisors (38137).

194198399 is an equidigital number, since it uses as much as digits as its factorization.

194198399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38136.

The product of its digits is 629856, while the sum is 53.

The square root of 194198399 is about 13935.5085662490. The cubic root of 194198399 is about 579.0933108572.

The spelling of 194198399 in words is "one hundred ninety-four million, one hundred ninety-eight thousand, three hundred ninety-nine".