109240405 has 12 divisors (see below), whose sum is σ = 138353292. Its totient is φ = 82791360.

The previous prime is 109240403. The next prime is 109240421. The reversal of 109240405 is 504042901.

It can be written as a sum of positive squares in 2 ways, for example, as 27102436 + 82137969 = 5206^2 + 9063^2 .

It is not a de Polignac number, because 109240405 - 2¹ = 109240403 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 109240405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109240403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28456 + ... + 32065.

It is an arithmetic number, because the mean of its divisors is an integer number (11529441).

Almost surely, 2^109240405 is an apocalyptic number.

It is an amenable number.

109240405 is a deficient number, since it is larger than the sum of its proper divisors (29112887).

109240405 is an equidigital number, since it uses as much as digits as its factorization.

109240405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60564 (or 60545 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 109240405 is about 10451.8134790093. The cubic root of 109240405 is about 478.0365468109.

The spelling of 109240405 in words is "one hundred nine million, two hundred forty thousand, four hundred five".