109193909 has 8 divisors (see below), whose sum is σ = 120106560. Its totient is φ = 99265980.

The previous prime is 109193897. The next prime is 109193923. The reversal of 109193909 is 909391901.

It is not a de Polignac number, because 109193909 - 2¹² = 109189813 is a prime.

It is a super-3 number, since 3×109193909³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109193999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39689 + ... + 42350.

It is an arithmetic number, because the mean of its divisors is an integer number (15013320).

Almost surely, 2^109193909 is an apocalyptic number.

It is an amenable number.

109193909 is a deficient number, since it is larger than the sum of its proper divisors (10912651).

109193909 is an frugal number, since it uses more digits than its factorization.

109193909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82072 (or 82050 counting only the distinct ones).

The product of its (nonzero) digits is 19683, while the sum is 41.

The square root of 109193909 is about 10449.5889392837. The cubic root of 109193909 is about 477.9687149450.

It can be divided in two parts, 10 and 9193909, that added together give a palindrome (9193919).

The spelling of 109193909 in words is "one hundred nine million, one hundred ninety-three thousand, nine hundred nine".