11981443 has 2 divisors, whose sum is σ = 11981444. Its totient is φ = 11981442.

The previous prime is 11981429. The next prime is 11981587. The reversal of 11981443 is 34418911.

11981443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11981443 - 2¹³ = 11973251 is a prime.

It is not a weakly prime, because it can be changed into another prime (11981423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5990721 + 5990722.

It is an arithmetic number, because the mean of its divisors is an integer number (5990722).

Almost surely, 2^11981443 is an apocalyptic number.

11981443 is a deficient number, since it is larger than the sum of its proper divisors (1).

11981443 is an equidigital number, since it uses as much as digits as its factorization.

11981443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 31.

The square root of 11981443 is about 3461.4221065915. The cubic root of 11981443 is about 228.8247739467.

The spelling of 11981443 in words is "eleven million, nine hundred eighty-one thousand, four hundred forty-three".