11771943 has 4 divisors (see below), whose sum is σ = 15695928. Its totient is φ = 7847960.

The previous prime is 11771927. The next prime is 11771959. The reversal of 11771943 is 34917711.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11771927) and next prime (11771959).

It is a cyclic number.

It is not a de Polignac number, because 11771943 - 2⁴ = 11771927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11771923) 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 in 3 ways as a sum of consecutive naturals, for example, 1961988 + ... + 1961993.

It is an arithmetic number, because the mean of its divisors is an integer number (3923982).

Almost surely, 2^11771943 is an apocalyptic number.

11771943 is a deficient number, since it is larger than the sum of its proper divisors (3923985).

11771943 is an equidigital number, since it uses as much as digits as its factorization.

11771943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3923984.

The product of its digits is 5292, while the sum is 33.

The square root of 11771943 is about 3431.0265227771. The cubic root of 11771943 is about 227.4832286473.

The spelling of 11771943 in words is "eleven million, seven hundred seventy-one thousand, nine hundred forty-three".