198593663 has 2 divisors, whose sum is σ = 198593664. Its totient is φ = 198593662.

The previous prime is 198593623. The next prime is 198593669. The reversal of 198593663 is 366395891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198593663 - 2⁶ = 198593599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198593669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99296831 + 99296832.

It is an arithmetic number, because the mean of its divisors is an integer number (99296832).

Almost surely, 2^198593663 is an apocalyptic number.

198593663 is a deficient number, since it is larger than the sum of its proper divisors (1).

198593663 is an equidigital number, since it uses as much as digits as its factorization.

198593663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1049760, while the sum is 50.

The square root of 198593663 is about 14092.3263870803. The cubic root of 198593663 is about 583.4296041020.

The spelling of 198593663 in words is "one hundred ninety-eight million, five hundred ninety-three thousand, six hundred sixty-three".