11927143 has 4 divisors (see below), whose sum is σ = 12180960. Its totient is φ = 11673328.

The previous prime is 11927137. The next prime is 11927171. The reversal of 11927143 is 34172911.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11927143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11927743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126838 + ... + 126931.

It is an arithmetic number, because the mean of its divisors is an integer number (3045240).

Almost surely, 2^11927143 is an apocalyptic number.

11927143 is a deficient number, since it is larger than the sum of its proper divisors (253817).

11927143 is an equidigital number, since it uses as much as digits as its factorization.

11927143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253816.

The product of its digits is 1512, while the sum is 28.

The square root of 11927143 is about 3453.5696025996. The cubic root of 11927143 is about 228.4785718246.

The spelling of 11927143 in words is "eleven million, nine hundred twenty-seven thousand, one hundred forty-three".