203440432189 has 2 divisors, whose sum is σ = 203440432190. Its totient is φ = 203440432188.

The previous prime is 203440432177. The next prime is 203440432229. The reversal of 203440432189 is 981234044302.

It is an a-pointer prime, because the next prime (203440432229) can be obtained adding 203440432189 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203283756900 + 156675289 = 450870^2 + 12517^2 .

It is a cyclic number.

It is not a de Polignac number, because 203440432189 - 2⁵ = 203440432157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203440432289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101720216094 + 101720216095.

It is an arithmetic number, because the mean of its divisors is an integer number (101720216095).

Almost surely, 2^203440432189 is an apocalyptic number.

It is an amenable number.

203440432189 is a deficient number, since it is larger than the sum of its proper divisors (1).

203440432189 is an equidigital number, since it uses as much as digits as its factorization.

203440432189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 203440432189 in words is "two hundred three billion, four hundred forty million, four hundred thirty-two thousand, one hundred eighty-nine".