109090 has 8 divisors (see below), whose sum is σ = 196380. Its totient is φ = 43632.

The previous prime is 109073. The next prime is 109097. The reversal of 109090 is 90901.

109090 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 2 ways, for example, as 104329 + 4761 = 323^2 + 69^2 .

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

It is an alternating number because its digits alternate between odd and even.

109090 is a modest number, since divided by 9090 gives 10 as remainder.

It is not an unprimeable number, because it can be changed into a prime (109097) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 5445 + ... + 5464.

2¹⁰⁹⁰⁹⁰ is an apocalyptic number.

109090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

109090 is a deficient number, since it is larger than the sum of its proper divisors (87290).

109090 is a wasteful number, since it uses less digits than its factorization.

109090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10916.

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

The square root of 109090 is about 330.2877533303. The cubic root of 109090 is about 47.7817055041.

Adding to 109090 its reverse (90901), we get a palindrome (199991).

The spelling of 109090 in words is "one hundred nine thousand, ninety".