109405839 has 4 divisors (see below), whose sum is σ = 145874456. Its totient is φ = 72937224.

The previous prime is 109405837. The next prime is 109405843. The reversal of 109405839 is 938504901.

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

It is not a de Polignac number, because 109405839 - 2¹ = 109405837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 109405797 and 109405806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109405837) 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, 18234304 + ... + 18234309.

It is an arithmetic number, because the mean of its divisors is an integer number (36468614).

Almost surely, 2^109405839 is an apocalyptic number.

109405839 is a deficient number, since it is larger than the sum of its proper divisors (36468617).

109405839 is an equidigital number, since it uses as much as digits as its factorization.

109405839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36468616.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 109405839 is about 10459.7246139657. The cubic root of 109405839 is about 478.2777384292.

The spelling of 109405839 in words is "one hundred nine million, four hundred five thousand, eight hundred thirty-nine".