198530587 has 2 divisors, whose sum is σ = 198530588. Its totient is φ = 198530586.

The previous prime is 198530551. The next prime is 198530599. The reversal of 198530587 is 785035891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198530587 - 2¹⁹ = 198006299 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198530537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99265293 + 99265294.

It is an arithmetic number, because the mean of its divisors is an integer number (99265294).

Almost surely, 2^198530587 is an apocalyptic number.

198530587 is a deficient number, since it is larger than the sum of its proper divisors (1).

198530587 is an equidigital number, since it uses as much as digits as its factorization.

198530587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 198530587 is about 14090.0882538045. The cubic root of 198530587 is about 583.3678292163.

The spelling of 198530587 in words is "one hundred ninety-eight million, five hundred thirty thousand, five hundred eighty-seven".