180998 has 4 divisors (see below), whose sum is σ = 271500. Its totient is φ = 90498.

The previous prime is 180959. The next prime is 181001. The reversal of 180998 is 899081.

It is a happy number.

180998 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 899081 = 173 ⋅5197.

It is a super-3 number, since 3×180998³ = 17788633308515976, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45248 + ... + 45251.

It is an arithmetic number, because the mean of its divisors is an integer number (67875).

2¹⁸⁰⁹⁹⁸ is an apocalyptic number.

180998 is a deficient number, since it is larger than the sum of its proper divisors (90502).

180998 is an equidigital number, since it uses as much as digits as its factorization.

180998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90501.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 180998 is about 425.4385972147. The cubic root of 180998 is about 56.5663199093.

The spelling of 180998 in words is "one hundred eighty thousand, nine hundred ninety-eight".