11908109 has 8 divisors (see below), whose sum is σ = 12684600. Its totient is φ = 11140096.

The previous prime is 11908073. The next prime is 11908121. The reversal of 11908109 is 90180911.

11908109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4318084 + 7590025 = 2078^2 + 2755^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11908109 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 (11908159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 917 + ... + 4965.

It is an arithmetic number, because the mean of its divisors is an integer number (1585575).

Almost surely, 2^11908109 is an apocalyptic number.

It is an amenable number.

11908109 is a deficient number, since it is larger than the sum of its proper divisors (776491).

11908109 is a wasteful number, since it uses less digits than its factorization.

11908109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4239.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 11908109 is about 3450.8128028046. The cubic root of 11908109 is about 228.3569674981.

The spelling of 11908109 in words is "eleven million, nine hundred eight thousand, one hundred nine".