198373563 has 8 divisors (see below), whose sum is σ = 293886800. Its totient is φ = 132249024.

The previous prime is 198373537. The next prime is 198373573. The reversal of 198373563 is 365373891.

198373563 is a `hidden beast` number, since 1 + 9 + 83 + 7 + 3 + 563 = 666.

It is not a de Polignac number, because 198373563 - 2⁶ = 198373499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198373573) 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, 3673558 + ... + 3673611.

It is an arithmetic number, because the mean of its divisors is an integer number (36735850).

Almost surely, 2^198373563 is an apocalyptic number.

198373563 is a deficient number, since it is larger than the sum of its proper divisors (95513237).

198373563 is an equidigital number, since it uses as much as digits as its factorization.

198373563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7347178 (or 7347172 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 198373563 is about 14084.5150076245. The cubic root of 198373563 is about 583.2139874120.

The spelling of 198373563 in words is "one hundred ninety-eight million, three hundred seventy-three thousand, five hundred sixty-three".