11831539 has 2 divisors, whose sum is σ = 11831540. Its totient is φ = 11831538.

The previous prime is 11831537. The next prime is 11831543. The reversal of 11831539 is 93513811.

11831539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (93513811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11831539 - 2¹ = 11831537 is a prime.

Together with 11831537, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 11831539.

It is not a weakly prime, because it can be changed into another prime (11831531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5915769 + 5915770.

It is an arithmetic number, because the mean of its divisors is an integer number (5915770).

Almost surely, 2^11831539 is an apocalyptic number.

11831539 is a deficient number, since it is larger than the sum of its proper divisors (1).

11831539 is an equidigital number, since it uses as much as digits as its factorization.

11831539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 31.

The square root of 11831539 is about 3439.7004230020. The cubic root of 11831539 is about 227.8664640748.

The spelling of 11831539 in words is "eleven million, eight hundred thirty-one thousand, five hundred thirty-nine".