198127330787 has 4 divisors (see below), whose sum is σ = 198949436136. Its totient is φ = 197305225440.

The previous prime is 198127330763. The next prime is 198127330813. The reversal of 198127330787 is 787033721891.

198127330787 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 an emirpimes, since its reverse is a distinct semiprime: 787033721891 = 21991 ⋅35788901.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198127330787 is a prime.

It is a super-3 number, since 3×198127330787³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198127330757) 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, 411052313 + ... + 411052794.

It is an arithmetic number, because the mean of its divisors is an integer number (49737359034).

Almost surely, 2^198127330787 is an apocalyptic number.

198127330787 is a deficient number, since it is larger than the sum of its proper divisors (822105349).

198127330787 is an equidigital number, since it uses as much as digits as its factorization.

198127330787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822105348.

The product of its (nonzero) digits is 3556224, while the sum is 56.

The spelling of 198127330787 in words is "one hundred ninety-eight billion, one hundred twenty-seven million, three hundred thirty thousand, seven hundred eighty-seven".