118672909 has 4 divisors (see below), whose sum is σ = 118694716. Its totient is φ = 118651104.

The previous prime is 118672889. The next prime is 118672921. The reversal of 118672909 is 909276811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 83210884 + 35462025 = 9122^2 + 5955^2 .

It is a cyclic number.

It is not a de Polignac number, because 118672909 - 2⁹ = 118672397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118672009) 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, 4777 + ... + 16129.

It is an arithmetic number, because the mean of its divisors is an integer number (29673679).

Almost surely, 2^118672909 is an apocalyptic number.

It is an amenable number.

118672909 is a deficient number, since it is larger than the sum of its proper divisors (21807).

118672909 is a wasteful number, since it uses less digits than its factorization.

118672909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21806.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 118672909 is about 10893.7096069245. The cubic root of 118672909 is about 491.4173995431.

The spelling of 118672909 in words is "one hundred eighteen million, six hundred seventy-two thousand, nine hundred nine".