9573944981 has 2 divisors, whose sum is σ = 9573944982. Its totient is φ = 9573944980.

The previous prime is 9573944977. The next prime is 9573944993. The reversal of 9573944981 is 1894493759.

9573944981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8130628900 + 1443316081 = 90170^2 + 37991^2 .

It is a cyclic number.

It is not a de Polignac number, because 9573944981 - 2² = 9573944977 is a prime.

It is a super-2 number, since 2×9573944981² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9573944981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9573944881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4786972490 + 4786972491.

It is an arithmetic number, because the mean of its divisors is an integer number (4786972491).

Almost surely, 2^9573944981 is an apocalyptic number.

It is an amenable number.

9573944981 is a deficient number, since it is larger than the sum of its proper divisors (1).

9573944981 is an equidigital number, since it uses as much as digits as its factorization.

9573944981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 59.

The square root of 9573944981 is about 97846.5379101376. The cubic root of 9573944981 is about 2123.3926469984.

The spelling of 9573944981 in words is "nine billion, five hundred seventy-three million, nine hundred forty-four thousand, nine hundred eighty-one".