109990 has 16 divisors (see below), whose sum is σ = 209952. Its totient is φ = 41344.

The previous prime is 109987. The next prime is 110017. The reversal of 109990 is 99901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154 + ... + 493.

It is an arithmetic number, because the mean of its divisors is an integer number (13122).

2¹⁰⁹⁹⁹⁰ is an apocalyptic number.

109990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109990 is a deficient number, since it is larger than the sum of its proper divisors (99962).

109990 is a wasteful number, since it uses less digits than its factorization.

109990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671.

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 109990 is about 331.6474031257. The cubic root of 109990 is about 47.9127465812.

It can be divided in two parts, 10 and 9990, that added together give a 4-th power (10000 = 10⁴).

The spelling of 109990 in words is "one hundred nine thousand, nine hundred ninety".