198526121 has 2 divisors, whose sum is σ = 198526122. Its totient is φ = 198526120.

The previous prime is 198526103. The next prime is 198526129. The reversal of 198526121 is 121625891.

198526121 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., 189888400 + 8637721 = 13780^2 + 2939^2 .

It is an emirp because it is prime and its reverse (121625891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198526121 - 2⁶ = 198526057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198526129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99263060 + 99263061.

It is an arithmetic number, because the mean of its divisors is an integer number (99263061).

Almost surely, 2^198526121 is an apocalyptic number.

It is an amenable number.

198526121 is a deficient number, since it is larger than the sum of its proper divisors (1).

198526121 is an equidigital number, since it uses as much as digits as its factorization.

198526121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 198526121 is about 14089.9297727136. The cubic root of 198526121 is about 583.3634548437.

The spelling of 198526121 in words is "one hundred ninety-eight million, five hundred twenty-six thousand, one hundred twenty-one".