7963947489 has 16 divisors (see below), whose sum is σ = 11189275200. Its totient is φ = 5024549376.

The previous prime is 7963947401. The next prime is 7963947503. The reversal of 7963947489 is 9847493697.

It is not a de Polignac number, because 7963947489 - 2¹⁶ = 7963881953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7963947389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18984 + ... + 127625.

It is an arithmetic number, because the mean of its divisors is an integer number (699329700).

Almost surely, 2^7963947489 is an apocalyptic number.

It is an amenable number.

7963947489 is a deficient number, since it is larger than the sum of its proper divisors (3225327711).

7963947489 is a wasteful number, since it uses less digits than its factorization.

7963947489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147584.

The product of its digits is 82301184, while the sum is 66.

The square root of 7963947489 is about 89240.9518606789. The cubic root of 7963947489 is about 1996.9910996126.

The spelling of 7963947489 in words is "seven billion, nine hundred sixty-three million, nine hundred forty-seven thousand, four hundred eighty-nine".