109992217 has 8 divisors (see below), whose sum is σ = 113105160. Its totient is φ = 106899840.

The previous prime is 109992209. The next prime is 109992221. The reversal of 109992217 is 712299901.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14167696 + 95824521 = 3764^2 + 9789^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 109992217 - 2³ = 109992209 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 109992217.

It is not an unprimeable number, because it can be changed into a prime (109992257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6043 + ... + 16015.

It is an arithmetic number, because the mean of its divisors is an integer number (14138145).

Almost surely, 2^109992217 is an apocalyptic number.

It is an amenable number.

109992217 is a deficient number, since it is larger than the sum of its proper divisors (3112943).

109992217 is an equidigital number, since it uses as much as digits as its factorization.

109992217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10283.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 109992217 is about 10487.7174351715. The cubic root of 109992217 is about 479.1306849486.

The spelling of 109992217 in words is "one hundred nine million, nine hundred ninety-two thousand, two hundred seventeen".