7972816589 has 2 divisors, whose sum is σ = 7972816590. Its totient is φ = 7972816588.

The previous prime is 7972816583. The next prime is 7972816609. The reversal of 7972816589 is 9856182797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6311031364 + 1661785225 = 79442^2 + 40765^2 .

It is a cyclic number.

It is not a de Polignac number, because 7972816589 - 2²⁸ = 7704381133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7972816583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3986408294 + 3986408295.

It is an arithmetic number, because the mean of its divisors is an integer number (3986408295).

Almost surely, 2^7972816589 is an apocalyptic number.

It is an amenable number.

7972816589 is a deficient number, since it is larger than the sum of its proper divisors (1).

7972816589 is an equidigital number, since it uses as much as digits as its factorization.

7972816589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 62.

The square root of 7972816589 is about 89290.6299059425. The cubic root of 7972816589 is about 1997.7321451392.

The spelling of 7972816589 in words is "seven billion, nine hundred seventy-two million, eight hundred sixteen thousand, five hundred eighty-nine".