7447181089 has 2 divisors, whose sum is σ = 7447181090. Its totient is φ = 7447181088.

The previous prime is 7447181039. The next prime is 7447181149. The reversal of 7447181089 is 9801817447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7025289489 + 421891600 = 83817^2 + 20540^2 .

It is an emirp because it is prime and its reverse (9801817447) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7447181089 - 2⁹ = 7447180577 is a prime.

It is not a weakly prime, because it can be changed into another prime (7447181039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3723590544 + 3723590545.

It is an arithmetic number, because the mean of its divisors is an integer number (3723590545).

Almost surely, 2^7447181089 is an apocalyptic number.

It is an amenable number.

7447181089 is a deficient number, since it is larger than the sum of its proper divisors (1).

7447181089 is an equidigital number, since it uses as much as digits as its factorization.

7447181089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 49.

The square root of 7447181089 is about 86297.0514502089. The cubic root of 7447181089 is about 1952.8279012742.

The spelling of 7447181089 in words is "seven billion, four hundred forty-seven million, one hundred eighty-one thousand, eighty-nine".