198586457 has 2 divisors, whose sum is σ = 198586458. Its totient is φ = 198586456.

The previous prime is 198586417. The next prime is 198586481. The reversal of 198586457 is 754685891.

198586457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110901961 + 87684496 = 10531^2 + 9364^2 .

It is a cyclic number.

It is not a de Polignac number, because 198586457 - 2²⁴ = 181809241 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 198586399 and 198586408.

It is not a weakly prime, because it can be changed into another prime (198586417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99293228 + 99293229.

It is an arithmetic number, because the mean of its divisors is an integer number (99293229).

Almost surely, 2^198586457 is an apocalyptic number.

It is an amenable number.

198586457 is a deficient number, since it is larger than the sum of its proper divisors (1).

198586457 is an equidigital number, since it uses as much as digits as its factorization.

198586457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 53.

The square root of 198586457 is about 14092.0707137028. The cubic root of 198586457 is about 583.4225474072.

The spelling of 198586457 in words is "one hundred ninety-eight million, five hundred eighty-six thousand, four hundred fifty-seven".