198410813 has 2 divisors, whose sum is σ = 198410814. Its totient is φ = 198410812.

The previous prime is 198410803. The next prime is 198410827. The reversal of 198410813 is 318014891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166848889 + 31561924 = 12917^2 + 5618^2 .

It is a cyclic number.

It is not a de Polignac number, because 198410813 - 2¹⁰ = 198409789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198410803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99205406 + 99205407.

It is an arithmetic number, because the mean of its divisors is an integer number (99205407).

Almost surely, 2^198410813 is an apocalyptic number.

It is an amenable number.

198410813 is a deficient number, since it is larger than the sum of its proper divisors (1).

198410813 is an equidigital number, since it uses as much as digits as its factorization.

198410813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 198410813 is about 14085.8373198046. The cubic root of 198410813 is about 583.2504898589.

The spelling of 198410813 in words is "one hundred ninety-eight million, four hundred ten thousand, eight hundred thirteen".