11908139 has 4 divisors (see below), whose sum is σ = 12023856. Its totient is φ = 11792424.

The previous prime is 11908133. The next prime is 11908157. The reversal of 11908139 is 93180911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11908139 - 2¹² = 11904043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11908133) 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, 57704 + ... + 57909.

It is an arithmetic number, because the mean of its divisors is an integer number (3005964).

Almost surely, 2^11908139 is an apocalyptic number.

11908139 is a deficient number, since it is larger than the sum of its proper divisors (115717).

11908139 is a wasteful number, since it uses less digits than its factorization.

11908139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115716.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 11908139 is about 3450.8171496038. The cubic root of 11908139 is about 228.3571592639.

The spelling of 11908139 in words is "eleven million, nine hundred eight thousand, one hundred thirty-nine".