203540089 has 2 divisors, whose sum is σ = 203540090. Its totient is φ = 203540088.

The previous prime is 203540081. The next prime is 203540093. The reversal of 203540089 is 980045302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179774464 + 23765625 = 13408^2 + 4875^2 .

It is a cyclic number.

It is not a de Polignac number, because 203540089 - 2³ = 203540081 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203540089.

It is not a weakly prime, because it can be changed into another prime (203540081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101770044 + 101770045.

It is an arithmetic number, because the mean of its divisors is an integer number (101770045).

Almost surely, 2^203540089 is an apocalyptic number.

It is an amenable number.

203540089 is a deficient number, since it is larger than the sum of its proper divisors (1).

203540089 is an equidigital number, since it uses as much as digits as its factorization.

203540089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 203540089 is about 14266.7476672155. The cubic root of 203540089 is about 588.2338151447.

It can be divided in two parts, 2035 and 40089, that added together give a palindrome (42124).

The spelling of 203540089 in words is "two hundred three million, five hundred forty thousand, eighty-nine".