109693409 has 12 divisors (see below), whose sum is σ = 130717188. Its totient is φ = 91728000.

The previous prime is 109693393. The next prime is 109693439. The reversal of 109693409 is 904396901.

It can be written as a sum of positive squares in 2 ways, for example, as 4528384 + 105165025 = 2128^2 + 10255^2 .

It is not a de Polignac number, because 109693409 - 2⁴ = 109693393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109693439) 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 11 ways as a sum of consecutive naturals, for example, 25292 + ... + 29309.

It is an arithmetic number, because the mean of its divisors is an integer number (10893099).

Almost surely, 2^109693409 is an apocalyptic number.

It is an amenable number.

109693409 is a deficient number, since it is larger than the sum of its proper divisors (21023779).

109693409 is an equidigital number, since it uses as much as digits as its factorization.

109693409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54656 (or 54649 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 109693409 is about 10473.4621305469. The cubic root of 109693409 is about 478.6964180933.

The spelling of 109693409 in words is "one hundred nine million, six hundred ninety-three thousand, four hundred nine".