198194701489 has 4 divisors (see below), whose sum is σ = 198375372324. Its totient is φ = 198014030656.

The previous prime is 198194701483. The next prime is 198194701493. The reversal of 198194701489 is 984107491891.

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

It can be written as a sum of positive squares in 2 ways, for example, as 147133616400 + 51061085089 = 383580^2 + 225967^2 .

It is a cyclic number.

It is not a de Polignac number, because 198194701489 - 2¹³ = 198194693297 is a prime.

It is a super-2 number, since 2×198194701489² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198194701483) 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 3 ways as a sum of consecutive naturals, for example, 90333772 + ... + 90335965.

It is an arithmetic number, because the mean of its divisors is an integer number (49593843081).

Almost surely, 2^198194701489 is an apocalyptic number.

It is an amenable number.

198194701489 is a deficient number, since it is larger than the sum of its proper divisors (180670835).

198194701489 is a wasteful number, since it uses less digits than its factorization.

198194701489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180670834.

The product of its (nonzero) digits is 5225472, while the sum is 61.

The spelling of 198194701489 in words is "one hundred ninety-eight billion, one hundred ninety-four million, seven hundred one thousand, four hundred eighty-nine".