109519943 has 6 divisors (see below), whose sum is σ = 118592784. Its totient is φ = 101095176.

The previous prime is 109519919. The next prime is 109519981. The reversal of 109519943 is 349915901.

It is not a de Polignac number, because 109519943 - 2⁸ = 109519687 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 109519943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109519643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 323855 + ... + 324192.

It is an arithmetic number, because the mean of its divisors is an integer number (19765464).

Almost surely, 2^109519943 is an apocalyptic number.

109519943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

109519943 is a deficient number, since it is larger than the sum of its proper divisors (9072841).

109519943 is an equidigital number, since it uses as much as digits as its factorization.

109519943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648073 (or 648060 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 109519943 is about 10465.1776382439. The cubic root of 109519943 is about 478.4439527198.

The spelling of 109519943 in words is "one hundred nine million, five hundred nineteen thousand, nine hundred forty-three".