198125563 has 2 divisors, whose sum is σ = 198125564. Its totient is φ = 198125562.

The previous prime is 198125537. The next prime is 198125567. The reversal of 198125563 is 365521891.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198125563 is a prime.

It is a super-3 number, since 3×198125563³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (198125567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99062781 + 99062782.

It is an arithmetic number, because the mean of its divisors is an integer number (99062782).

Almost surely, 2^198125563 is an apocalyptic number.

198125563 is a deficient number, since it is larger than the sum of its proper divisors (1).

198125563 is an equidigital number, since it uses as much as digits as its factorization.

198125563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 40.

The square root of 198125563 is about 14075.7082592671. The cubic root of 198125563 is about 582.9708478490.

The spelling of 198125563 in words is "one hundred ninety-eight million, one hundred twenty-five thousand, five hundred sixty-three".