198858229 has 2 divisors, whose sum is σ = 198858230. Its totient is φ = 198858228.

The previous prime is 198858223. The next prime is 198858259. The reversal of 198858229 is 922858891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171557604 + 27300625 = 13098^2 + 5225^2 .

It is a cyclic number.

It is not a de Polignac number, because 198858229 - 2²⁵ = 165303797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198858223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99429114 + 99429115.

It is an arithmetic number, because the mean of its divisors is an integer number (99429115).

Almost surely, 2^198858229 is an apocalyptic number.

It is an amenable number.

198858229 is a deficient number, since it is larger than the sum of its proper divisors (1).

198858229 is an equidigital number, since it uses as much as digits as its factorization.

198858229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 52.

The square root of 198858229 is about 14101.7101445179. The cubic root of 198858229 is about 583.6885703095.

The spelling of 198858229 in words is "one hundred ninety-eight million, eight hundred fifty-eight thousand, two hundred twenty-nine".