663536189 has 2 divisors, whose sum is σ = 663536190. Its totient is φ = 663536188.

The previous prime is 663536173. The next prime is 663536261. The reversal of 663536189 is 981635366.

663536189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 632120164 + 31416025 = 25142^2 + 5605^2 .

It is a cyclic number.

It is not a de Polignac number, because 663536189 - 2⁴ = 663536173 is a prime.

It is a super-2 number, since 2×663536189² = 880560548225287442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663536119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331768094 + 331768095.

It is an arithmetic number, because the mean of its divisors is an integer number (331768095).

Almost surely, 2^663536189 is an apocalyptic number.

It is an amenable number.

663536189 is a deficient number, since it is larger than the sum of its proper divisors (1).

663536189 is an equidigital number, since it uses as much as digits as its factorization.

663536189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 47.

The square root of 663536189 is about 25759.1962025215. The cubic root of 663536189 is about 872.2109568198.

It can be divided in two parts, 6635 and 36189, that added together give a palindrome (42824).

The spelling of 663536189 in words is "six hundred sixty-three million, five hundred thirty-six thousand, one hundred eighty-nine".