11989881443 has 2 divisors, whose sum is σ = 11989881444. Its totient is φ = 11989881442.

The previous prime is 11989881437. The next prime is 11989881451. The reversal of 11989881443 is 34418898911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11989881443 - 2⁴ = 11989881427 is a prime.

It is not a weakly prime, because it can be changed into another prime (11989881493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5994940721 + 5994940722.

It is an arithmetic number, because the mean of its divisors is an integer number (5994940722).

Almost surely, 2^11989881443 is an apocalyptic number.

11989881443 is a deficient number, since it is larger than the sum of its proper divisors (1).

11989881443 is an equidigital number, since it uses as much as digits as its factorization.

11989881443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1990656, while the sum is 56.

The spelling of 11989881443 in words is "eleven billion, nine hundred eighty-nine million, eight hundred eighty-one thousand, four hundred forty-three".