180398089 has 4 divisors (see below), whose sum is σ = 180516100. Its totient is φ = 180280080.

The previous prime is 180398087. The next prime is 180398117. The reversal of 180398089 is 980893081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31753225 + 148644864 = 5635^2 + 12192^2 .

It is a cyclic number.

It is not a de Polignac number, because 180398089 - 2¹ = 180398087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180398081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56682 + ... + 59779.

It is an arithmetic number, because the mean of its divisors is an integer number (45129025).

Almost surely, 2^180398089 is an apocalyptic number.

It is an amenable number.

180398089 is a deficient number, since it is larger than the sum of its proper divisors (118011).

180398089 is a wasteful number, since it uses less digits than its factorization.

180398089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118010.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 180398089 is about 13431.2355723515. The cubic root of 180398089 is about 565.0375509540.

The spelling of 180398089 in words is "one hundred eighty million, three hundred ninety-eight thousand, eighty-nine".