109900 has 36 divisors (see below), whose sum is σ = 274288. Its totient is φ = 37440.

The previous prime is 109897. The next prime is 109903. The reversal of 109900 is 9901.

109900 is nontrivially palindromic in base 9.

It is an interprime number because it is at equal distance from previous prime (109897) and next prime (109903).

It is not an unprimeable number, because it can be changed into a prime (109903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 622 + ... + 778.

2¹⁰⁹⁹⁰⁰ is an apocalyptic number.

109900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137144).

109900 is an abundant number, since it is smaller than the sum of its proper divisors (164388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109900 is a wasteful number, since it uses less digits than its factorization.

109900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 109900 is about 331.5116890850. The cubic root of 109900 is about 47.8996747145.

Subtracting from 109900 its reverse (9901), we obtain a palindrome (99999).

The spelling of 109900 in words is "one hundred nine thousand, nine hundred".