198963697 has 2 divisors, whose sum is σ = 198963698. Its totient is φ = 198963696.

The previous prime is 198963671. The next prime is 198963703. The reversal of 198963697 is 796369891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198133776 + 829921 = 14076^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 198963697 - 2²³ = 190575089 is a prime.

It is not a weakly prime, because it can be changed into another prime (198963607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99481848 + 99481849.

It is an arithmetic number, because the mean of its divisors is an integer number (99481849).

Almost surely, 2^198963697 is an apocalyptic number.

It is an amenable number.

198963697 is a deficient number, since it is larger than the sum of its proper divisors (1).

198963697 is an equidigital number, since it uses as much as digits as its factorization.

198963697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 58.

The square root of 198963697 is about 14105.4491952578. The cubic root of 198963697 is about 583.7917419449.

The spelling of 198963697 in words is "one hundred ninety-eight million, nine hundred sixty-three thousand, six hundred ninety-seven".