109849169 has 2 divisors, whose sum is σ = 109849170. Its totient is φ = 109849168.

The previous prime is 109849153. The next prime is 109849171. The reversal of 109849169 is 961948901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109830400 + 18769 = 10480^2 + 137^2 .

It is a cyclic number.

It is not a de Polignac number, because 109849169 - 2⁴ = 109849153 is a prime.

It is a super-2 number, since 2×109849169² = 24133679859981122, which contains 22 as substring.

Together with 109849171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (109840169) 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 as a sum of consecutive naturals, namely, 54924584 + 54924585.

It is an arithmetic number, because the mean of its divisors is an integer number (54924585).

Almost surely, 2^109849169 is an apocalyptic number.

It is an amenable number.

109849169 is a deficient number, since it is larger than the sum of its proper divisors (1).

109849169 is an equidigital number, since it uses as much as digits as its factorization.

109849169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 109849169 is about 10480.8954293037. The cubic root of 109849169 is about 478.9228871554.

The spelling of 109849169 in words is "one hundred nine million, eight hundred forty-nine thousand, one hundred sixty-nine".