109505839 has 4 divisors (see below), whose sum is σ = 110079360. Its totient is φ = 108932320.

The previous prime is 109505819. The next prime is 109505843. The reversal of 109505839 is 938505901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 109505839 - 2⁵ = 109505807 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109505819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286474 + ... + 286855.

It is an arithmetic number, because the mean of its divisors is an integer number (27519840).

Almost surely, 2^109505839 is an apocalyptic number.

109505839 is a deficient number, since it is larger than the sum of its proper divisors (573521).

109505839 is an equidigital number, since it uses as much as digits as its factorization.

109505839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573520.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 109505839 is about 10464.5037627209. The cubic root of 109505839 is about 478.4234138024.

The spelling of 109505839 in words is "one hundred nine million, five hundred five thousand, eight hundred thirty-nine".