1443978963 has 36 divisors (see below), whose sum is σ = 2532209680. Its totient is φ = 776583936.

The previous prime is 1443978953. The next prime is 1443978989. The reversal of 1443978963 is 3698793441.

It is a happy number.

It is not a de Polignac number, because 1443978963 - 2⁹ = 1443978451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1443978953) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21448 + ... + 57861.

Almost surely, 2^1443978963 is an apocalyptic number.

1443978963 is a deficient number, since it is larger than the sum of its proper divisors (1088230717).

1443978963 is a wasteful number, since it uses less digits than its factorization.

1443978963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79356 (or 79336 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 1443978963 is about 37999.7231963603. The cubic root of 1443978963 is about 1130.2823746768.

The spelling of 1443978963 in words is "one billion, four hundred forty-three million, nine hundred seventy-eight thousand, nine hundred sixty-three".