11543839 has 2 divisors, whose sum is σ = 11543840. Its totient is φ = 11543838.

The previous prime is 11543821. The next prime is 11543843. The reversal of 11543839 is 93834511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11543839 - 2¹³ = 11535647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11543809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5771919 + 5771920.

It is an arithmetic number, because the mean of its divisors is an integer number (5771920).

Almost surely, 2^11543839 is an apocalyptic number.

11543839 is a deficient number, since it is larger than the sum of its proper divisors (1).

11543839 is an equidigital number, since it uses as much as digits as its factorization.

11543839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 34.

The square root of 11543839 is about 3397.6225511378. The cubic root of 11543839 is about 226.0043268026.

The spelling of 11543839 in words is "eleven million, five hundred forty-three thousand, eight hundred thirty-nine".