198528137 has 2 divisors, whose sum is σ = 198528138. Its totient is φ = 198528136.

The previous prime is 198528079. The next prime is 198528139. The reversal of 198528137 is 731825891.

198528137 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., 174134416 + 24393721 = 13196^2 + 4939^2 .

It is a cyclic number.

It is not a de Polignac number, because 198528137 - 2¹² = 198524041 is a prime.

Together with 198528139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198528139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99264068 + 99264069.

It is an arithmetic number, because the mean of its divisors is an integer number (99264069).

Almost surely, 2^198528137 is an apocalyptic number.

It is an amenable number.

198528137 is a deficient number, since it is larger than the sum of its proper divisors (1).

198528137 is an equidigital number, since it uses as much as digits as its factorization.

198528137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 44.

The square root of 198528137 is about 14090.0013129879. The cubic root of 198528137 is about 583.3654294902.

The spelling of 198528137 in words is "one hundred ninety-eight million, five hundred twenty-eight thousand, one hundred thirty-seven".