198082813 has 2 divisors, whose sum is σ = 198082814. Its totient is φ = 198082812.

The previous prime is 198082747. The next prime is 198082837. The reversal of 198082813 is 318280891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167909764 + 30173049 = 12958^2 + 5493^2 .

It is an emirp because it is prime and its reverse (318280891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198082813 - 2²¹ = 195985661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198082613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99041406 + 99041407.

It is an arithmetic number, because the mean of its divisors is an integer number (99041407).

Almost surely, 2^198082813 is an apocalyptic number.

It is an amenable number.

198082813 is a deficient number, since it is larger than the sum of its proper divisors (1).

198082813 is an equidigital number, since it uses as much as digits as its factorization.

198082813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 198082813 is about 14074.1896036681. The cubic root of 198082813 is about 582.9289151876.

The spelling of 198082813 in words is "one hundred ninety-eight million, eighty-two thousand, eight hundred thirteen".