11538239 has 2 divisors, whose sum is σ = 11538240. Its totient is φ = 11538238.

The previous prime is 11538229. The next prime is 11538253. The reversal of 11538239 is 93283511.

It is a weak prime.

It is an emirp because it is prime and its reverse (93283511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11538239 is a prime.

It is a super-2 number, since 2×11538239² = 266261918442242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11538229) 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 as a sum of consecutive naturals, namely, 5769119 + 5769120.

It is an arithmetic number, because the mean of its divisors is an integer number (5769120).

Almost surely, 2^11538239 is an apocalyptic number.

11538239 is a deficient number, since it is larger than the sum of its proper divisors (1).

11538239 is an equidigital number, since it uses as much as digits as its factorization.

11538239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 11538239 is about 3396.7983455012. The cubic root of 11538239 is about 225.9677754456.

The spelling of 11538239 in words is "eleven million, five hundred thirty-eight thousand, two hundred thirty-nine".