198791309423 has 8 divisors (see below), whose sum is σ = 230580964992. Its totient is φ = 167849378136.

The previous prime is 198791309383. The next prime is 198791309447. The reversal of 198791309423 is 324903197891.

198791309423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 198791309423 - 2¹⁴ = 198791293039 is a prime.

It is a super-2 number, since 2×198791309423² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198791309473) 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 7 ways as a sum of consecutive naturals, for example, 211930565 + ... + 211931502.

It is an arithmetic number, because the mean of its divisors is an integer number (28822620624).

Almost surely, 2^198791309423 is an apocalyptic number.

198791309423 is a deficient number, since it is larger than the sum of its proper divisors (31789655569).

198791309423 is an equidigital number, since it uses as much as digits as its factorization.

198791309423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423862141.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The spelling of 198791309423 in words is "one hundred ninety-eight billion, seven hundred ninety-one million, three hundred nine thousand, four hundred twenty-three".