198048857 has 2 divisors, whose sum is σ = 198048858. Its totient is φ = 198048856.

The previous prime is 198048839. The next prime is 198048869. The reversal of 198048857 is 758840891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120538441 + 77510416 = 10979^2 + 8804^2 .

It is an emirp because it is prime and its reverse (758840891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198048857 - 2¹⁶ = 197983321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198048817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99024428 + 99024429.

It is an arithmetic number, because the mean of its divisors is an integer number (99024429).

Almost surely, 2^198048857 is an apocalyptic number.

It is an amenable number.

198048857 is a deficient number, since it is larger than the sum of its proper divisors (1).

198048857 is an equidigital number, since it uses as much as digits as its factorization.

198048857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 50.

The square root of 198048857 is about 14072.9832302892. The cubic root of 198048857 is about 582.8956040939.

The spelling of 198048857 in words is "one hundred ninety-eight million, forty-eight thousand, eight hundred fifty-seven".