9981238273 has 2 divisors, whose sum is σ = 9981238274. Its totient is φ = 9981238272.

The previous prime is 9981238181. The next prime is 9981238297. The reversal of 9981238273 is 3728321899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6461426689 + 3519811584 = 80383^2 + 59328^2 .

It is an emirp because it is prime and its reverse (3728321899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9981238273 - 2²¹ = 9979141121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9981238273.

It is not a weakly prime, because it can be changed into another prime (9981238573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4990619136 + 4990619137.

It is an arithmetic number, because the mean of its divisors is an integer number (4990619137).

Almost surely, 2^9981238273 is an apocalyptic number.

It is an amenable number.

9981238273 is a deficient number, since it is larger than the sum of its proper divisors (1).

9981238273 is an equidigital number, since it uses as much as digits as its factorization.

9981238273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The square root of 9981238273 is about 99906.1473233755. The cubic root of 9981238273 is about 2153.0864826736.

The spelling of 9981238273 in words is "nine billion, nine hundred eighty-one million, two hundred thirty-eight thousand, two hundred seventy-three".