108998 has 4 divisors (see below), whose sum is σ = 163500. Its totient is φ = 54498.

The previous prime is 108991. The next prime is 109001. The reversal of 108998 is 899801.

It is a happy number.

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

It is an Ulam number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27248 + ... + 27251.

It is an arithmetic number, because the mean of its divisors is an integer number (40875).

2¹⁰⁸⁹⁹⁸ is an apocalyptic number.

108998 is a deficient number, since it is larger than the sum of its proper divisors (54502).

108998 is an equidigital number, since it uses as much as digits as its factorization.

108998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54501.

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

The square root of 108998 is about 330.1484514578. The cubic root of 108998 is about 47.7682696461.

The spelling of 108998 in words is "one hundred eight thousand, nine hundred ninety-eight".