109175609 has 4 divisors (see below), whose sum is σ = 109548516. Its totient is φ = 108802704.

The previous prime is 109175603. The next prime is 109175611. The reversal of 109175609 is 906571901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906571901 = 2447 ⋅370483.

It can be written as a sum of positive squares in 2 ways, for example, as 60217600 + 48958009 = 7760^2 + 6997^2 .

It is a cyclic number.

It is not a de Polignac number, because 109175609 - 2⁴ = 109175593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (109175603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186014 + ... + 186599.

It is an arithmetic number, because the mean of its divisors is an integer number (27387129).

Almost surely, 2^109175609 is an apocalyptic number.

It is an amenable number.

109175609 is a deficient number, since it is larger than the sum of its proper divisors (372907).

109175609 is an equidigital number, since it uses as much as digits as its factorization.

109175609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372906.

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 109175609 is about 10448.7132700634. The cubic root of 109175609 is about 477.9420122463.

The spelling of 109175609 in words is "one hundred nine million, one hundred seventy-five thousand, six hundred nine".