198322693 has 2 divisors, whose sum is σ = 198322694. Its totient is φ = 198322692.

The previous prime is 198322639. The next prime is 198322711. The reversal of 198322693 is 396223891.

Together with previous prime (198322639) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143592289 + 54730404 = 11983^2 + 7398^2 .

It is a cyclic number.

It is not a de Polignac number, because 198322693 - 2⁹ = 198322181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198322193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99161346 + 99161347.

It is an arithmetic number, because the mean of its divisors is an integer number (99161347).

Almost surely, 2^198322693 is an apocalyptic number.

It is an amenable number.

198322693 is a deficient number, since it is larger than the sum of its proper divisors (1).

198322693 is an equidigital number, since it uses as much as digits as its factorization.

198322693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 198322693 is about 14082.7090078578. The cubic root of 198322693 is about 583.1641309166.

The spelling of 198322693 in words is "one hundred ninety-eight million, three hundred twenty-two thousand, six hundred ninety-three".