198795797 has 2 divisors, whose sum is σ = 198795798. Its totient is φ = 198795796.

The previous prime is 198795763. The next prime is 198795799. The reversal of 198795797 is 797597891.

198795797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186022321 + 12773476 = 13639^2 + 3574^2 .

It is a cyclic number.

It is not a de Polignac number, because 198795797 - 2¹⁶ = 198730261 is a prime.

Together with 198795799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198795799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99397898 + 99397899.

It is an arithmetic number, because the mean of its divisors is an integer number (99397899).

Almost surely, 2^198795797 is an apocalyptic number.

It is an amenable number.

198795797 is a deficient number, since it is larger than the sum of its proper divisors (1).

198795797 is an equidigital number, since it uses as much as digits as its factorization.

198795797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10001880, while the sum is 62.

The square root of 198795797 is about 14099.4963385222. The cubic root of 198795797 is about 583.6274804580.

The spelling of 198795797 in words is "one hundred ninety-eight million, seven hundred ninety-five thousand, seven hundred ninety-seven".