11855959 has 2 divisors, whose sum is σ = 11855960. Its totient is φ = 11855958.

The previous prime is 11855933. The next prime is 11855989. The reversal of 11855959 is 95955811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11855959 - 2¹⁷ = 11724887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11855989) 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, 5927979 + 5927980.

It is an arithmetic number, because the mean of its divisors is an integer number (5927980).

Almost surely, 2^11855959 is an apocalyptic number.

11855959 is a deficient number, since it is larger than the sum of its proper divisors (1).

11855959 is an equidigital number, since it uses as much as digits as its factorization.

11855959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 43.

The square root of 11855959 is about 3443.2483209899. The cubic root of 11855959 is about 228.0231265656.

The spelling of 11855959 in words is "eleven million, eight hundred fifty-five thousand, nine hundred fifty-nine".