109849 has 2 divisors, whose sum is σ = 109850. Its totient is φ = 109848.

The previous prime is 109847. The next prime is 109859. The reversal of 109849 is 948901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71824 + 38025 = 268^2 + 195^2 .

It is an emirp because it is prime and its reverse (948901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109849 - 2¹ = 109847 is a prime.

Together with 109847, it forms a pair of twin primes.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 109849.

It is not a weakly prime, because it can be changed into another prime (109841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54924 + 54925.

It is an arithmetic number, because the mean of its divisors is an integer number (54925).

2¹⁰⁹⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

109849 is a deficient number, since it is larger than the sum of its proper divisors (1).

109849 is an equidigital number, since it uses as much as digits as its factorization.

109849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 109849 is about 331.4347597944. The cubic root of 109849 is about 47.8922641552.

The spelling of 109849 in words is "one hundred nine thousand, eight hundred forty-nine".