198009714281 has 4 divisors (see below), whose sum is σ = 198041849232. Its totient is φ = 197977579332.

The previous prime is 198009714277. The next prime is 198009714289. The reversal of 198009714281 is 182417900891.

It is a happy number.

198009714281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 198009714281 - 2² = 198009714277 is a prime.

It is a super-2 number, since 2×198009714281² (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 (198009714289) 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, 16058231 + ... + 16070556.

It is an arithmetic number, because the mean of its divisors is an integer number (49510462308).

Almost surely, 2^198009714281 is an apocalyptic number.

It is an amenable number.

198009714281 is a deficient number, since it is larger than the sum of its proper divisors (32134951).

198009714281 is an equidigital number, since it uses as much as digits as its factorization.

198009714281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32134950.

The product of its (nonzero) digits is 290304, while the sum is 50.

The spelling of 198009714281 in words is "one hundred ninety-eight billion, nine million, seven hundred fourteen thousand, two hundred eighty-one".