11831139 has 6 divisors (see below), whose sum is σ = 17089436. Its totient is φ = 7887420.

The previous prime is 11831123. The next prime is 11831219. The reversal of 11831139 is 93113811.

It is a happy number.

11831139 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11831139 - 2⁴ = 11831123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11831539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 657277 + ... + 657294.

Almost surely, 2^11831139 is an apocalyptic number.

11831139 is a deficient number, since it is larger than the sum of its proper divisors (5258297).

11831139 is a wasteful number, since it uses less digits than its factorization.

11831139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314577 (or 1314574 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 11831139 is about 3439.6422779121. The cubic root of 11831139 is about 227.8638961471.

The spelling of 11831139 in words is "eleven million, eight hundred thirty-one thousand, one hundred thirty-nine".