109090217 has 4 divisors (see below), whose sum is σ = 111750996. Its totient is φ = 106429440.

The previous prime is 109090211. The next prime is 109090249. The reversal of 109090217 is 712090901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 712090901 = 3049 ⋅233549.

It can be written as a sum of positive squares in 2 ways, for example, as 64947481 + 44142736 = 8059^2 + 6644^2 .

It is not a de Polignac number, because 109090217 - 2²⁰ = 108041641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 109090217.

It is not an unprimeable number, because it can be changed into a prime (109090211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1330328 + ... + 1330409.

It is an arithmetic number, because the mean of its divisors is an integer number (27937749).

Almost surely, 2^109090217 is an apocalyptic number.

It is an amenable number.

109090217 is a deficient number, since it is larger than the sum of its proper divisors (2660779).

109090217 is an equidigital number, since it uses as much as digits as its factorization.

109090217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660778.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 109090217 is about 10444.6262259595. The cubic root of 109090217 is about 477.8173718624.

The spelling of 109090217 in words is "one hundred nine million, ninety thousand, two hundred seventeen".