180686489 has 8 divisors (see below), whose sum is σ = 192601800. Its totient is φ = 168914176.

The previous prime is 180686483. The next prime is 180686531. The reversal of 180686489 is 984686081.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13630864 + 167055625 = 3692^2 + 12925^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 180686489 - 2¹² = 180682393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (180686483) 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 in 7 ways as a sum of consecutive naturals, for example, 33134 + ... + 38199.

It is an arithmetic number, because the mean of its divisors is an integer number (24075225).

Almost surely, 2^180686489 is an apocalyptic number.

It is an amenable number.

180686489 is a deficient number, since it is larger than the sum of its proper divisors (11915311).

180686489 is a wasteful number, since it uses less digits than its factorization.

180686489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71499.

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 180686489 is about 13441.9674527206. The cubic root of 180686489 is about 565.3384966175.

The spelling of 180686489 in words is "one hundred eighty million, six hundred eighty-six thousand, four hundred eighty-nine".