118240609 has 4 divisors (see below), whose sum is σ = 118514116. Its totient is φ = 117967104.

The previous prime is 118240561. The next prime is 118240613. The reversal of 118240609 is 906042811.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 906042811 = 613 ⋅1478047.

It can be written as a sum of positive squares in 2 ways, for example, as 3686400 + 114554209 = 1920^2 + 10703^2 .

It is a cyclic number.

It is not a de Polignac number, because 118240609 - 2⁷ = 118240481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118240649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136104 + ... + 136969.

It is an arithmetic number, because the mean of its divisors is an integer number (29628529).

Almost surely, 2^118240609 is an apocalyptic number.

It is an amenable number.

118240609 is a deficient number, since it is larger than the sum of its proper divisors (273507).

118240609 is an equidigital number, since it uses as much as digits as its factorization.

118240609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273506.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 118240609 is about 10873.8497782524. The cubic root of 118240609 is about 490.8199640530.

The spelling of 118240609 in words is "one hundred eighteen million, two hundred forty thousand, six hundred nine".