198516863 has 4 divisors (see below), whose sum is σ = 198573408. Its totient is φ = 198460320.

The previous prime is 198516847. The next prime is 198516917. The reversal of 198516863 is 368615891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 368615891 = 7 ⋅52659413.

It is a cyclic number.

It is not a de Polignac number, because 198516863 - 2⁴ = 198516847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198516833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22631 + ... + 30152.

It is an arithmetic number, because the mean of its divisors is an integer number (49643352).

Almost surely, 2^198516863 is an apocalyptic number.

198516863 is a deficient number, since it is larger than the sum of its proper divisors (56545).

198516863 is an equidigital number, since it uses as much as digits as its factorization.

198516863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56544.

The product of its digits is 311040, while the sum is 47.

The square root of 198516863 is about 14089.6012363729. The cubic root of 198516863 is about 583.3543865780.

The spelling of 198516863 in words is "one hundred ninety-eight million, five hundred sixteen thousand, eight hundred sixty-three".