198923502889 has 8 divisors (see below), whose sum is σ = 199210798080. Its totient is φ = 198636328896.

The previous prime is 198923502871. The next prime is 198923502923. The reversal of 198923502889 is 988205329891.

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 198923502889 - 2¹⁷ = 198923371817 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 198923502889.

It is not an unprimeable number, because it can be changed into a prime (198923500889) 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 7 ways as a sum of consecutive naturals, for example, 3557304 + ... + 3612790.

It is an arithmetic number, because the mean of its divisors is an integer number (24901349760).

Almost surely, 2^198923502889 is an apocalyptic number.

It is an amenable number.

198923502889 is a deficient number, since it is larger than the sum of its proper divisors (287295191).

198923502889 is an equidigital number, since it uses as much as digits as its factorization.

198923502889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60599.

The product of its (nonzero) digits is 22394880, while the sum is 64.

The spelling of 198923502889 in words is "one hundred ninety-eight billion, nine hundred twenty-three million, five hundred two thousand, eight hundred eighty-nine".