11443987963 has 2 divisors, whose sum is σ = 11443987964. Its totient is φ = 11443987962.

The previous prime is 11443987957. The next prime is 11443987967. The reversal of 11443987963 is 36978934411.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11443987963 is a prime.

It is not a weakly prime, because it can be changed into another prime (11443987967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5721993981 + 5721993982.

It is an arithmetic number, because the mean of its divisors is an integer number (5721993982).

Almost surely, 2^11443987963 is an apocalyptic number.

11443987963 is a deficient number, since it is larger than the sum of its proper divisors (1).

11443987963 is an equidigital number, since it uses as much as digits as its factorization.

11443987963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 55.

The spelling of 11443987963 in words is "eleven billion, four hundred forty-three million, nine hundred eighty-seven thousand, nine hundred sixty-three".