198955297 has 2 divisors, whose sum is σ = 198955298. Its totient is φ = 198955296.

The previous prime is 198955271. The next prime is 198955307. The reversal of 198955297 is 792559891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170981776 + 27973521 = 13076^2 + 5289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198955297 is a prime.

It is not a weakly prime, because it can be changed into another prime (198955997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99477648 + 99477649.

It is an arithmetic number, because the mean of its divisors is an integer number (99477649).

Almost surely, 2^198955297 is an apocalyptic number.

It is an amenable number.

198955297 is a deficient number, since it is larger than the sum of its proper divisors (1).

198955297 is an equidigital number, since it uses as much as digits as its factorization.

198955297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 55.

The square root of 198955297 is about 14105.1514348482. The cubic root of 198955297 is about 583.7835261754.

The spelling of 198955297 in words is "one hundred ninety-eight million, nine hundred fifty-five thousand, two hundred ninety-seven".