180638089 has 2 divisors, whose sum is σ = 180638090. Its totient is φ = 180638088.

The previous prime is 180638083. The next prime is 180638099. The reversal of 180638089 is 980836081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180633600 + 4489 = 13440^2 + 67^2 .

It is a cyclic number.

It is not a de Polignac number, because 180638089 - 2⁹ = 180637577 is a prime.

It is not a weakly prime, because it can be changed into another prime (180638083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90319044 + 90319045.

It is an arithmetic number, because the mean of its divisors is an integer number (90319045).

Almost surely, 2^180638089 is an apocalyptic number.

It is an amenable number.

180638089 is a deficient number, since it is larger than the sum of its proper divisors (1).

180638089 is an equidigital number, since it uses as much as digits as its factorization.

180638089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 180638089 is about 13440.1670004506. The cubic root of 180638089 is about 565.2880135461.

The spelling of 180638089 in words is "one hundred eighty million, six hundred thirty-eight thousand, eighty-nine".