109197909 has 16 divisors (see below), whose sum is σ = 162123840. Its totient is φ = 72641520.

The previous prime is 109197833. The next prime is 109197911. The reversal of 109197909 is 909791901.

It is not a de Polignac number, because 109197909 - 2¹¹ = 109195861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109197509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9139 + ... + 17375.

It is an arithmetic number, because the mean of its divisors is an integer number (10132740).

Almost surely, 2^109197909 is an apocalyptic number.

It is an amenable number.

109197909 is a deficient number, since it is larger than the sum of its proper divisors (52925931).

109197909 is an equidigital number, since it uses as much as digits as its factorization.

109197909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8737 (or 8731 counting only the distinct ones).

The product of its (nonzero) digits is 45927, while the sum is 45.

The square root of 109197909 is about 10449.7803326194. The cubic root of 109197909 is about 477.9745512031.

It can be divided in two parts, 10 and 9197909, that added together give a palindrome (9197919).

The spelling of 109197909 in words is "one hundred nine million, one hundred ninety-seven thousand, nine hundred nine".