11815939 has 2 divisors, whose sum is σ = 11815940. Its totient is φ = 11815938.

The previous prime is 11815879. The next prime is 11815943. The reversal of 11815939 is 93951811.

It is a happy number.

11815939 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (93951811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11815939 - 2¹¹ = 11813891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11815898 and 11815907.

It is not a weakly prime, because it can be changed into another prime (11815949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5907969 + 5907970.

It is an arithmetic number, because the mean of its divisors is an integer number (5907970).

Almost surely, 2^11815939 is an apocalyptic number.

11815939 is a deficient number, since it is larger than the sum of its proper divisors (1).

11815939 is an equidigital number, since it uses as much as digits as its factorization.

11815939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 37.

The square root of 11815939 is about 3437.4320356918. The cubic root of 11815939 is about 227.7662719726.

The spelling of 11815939 in words is "eleven million, eight hundred fifteen thousand, nine hundred thirty-nine".