11771993 has 4 divisors (see below), whose sum is σ = 11824080. Its totient is φ = 11719908.

The previous prime is 11771983. The next prime is 11772029. The reversal of 11771993 is 39917711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11771993 - 2⁸ = 11771737 is a prime.

It is a Duffinian 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, 25703 + ... + 26156.

It is an arithmetic number, because the mean of its divisors is an integer number (2956020).

Almost surely, 2^11771993 is an apocalyptic number.

It is an amenable number.

11771993 is a deficient number, since it is larger than the sum of its proper divisors (52087).

11771993 is an equidigital number, since it uses as much as digits as its factorization.

11771993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52086.

The product of its digits is 11907, while the sum is 38.

The square root of 11771993 is about 3431.0338092184. The cubic root of 11771993 is about 227.4835507166.

The spelling of 11771993 in words is "eleven million, seven hundred seventy-one thousand, nine hundred ninety-three".