8981315249 has 2 divisors, whose sum is σ = 8981315250. Its totient is φ = 8981315248.

The previous prime is 8981315201. The next prime is 8981315251. The reversal of 8981315249 is 9425131898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8976615025 + 4700224 = 94745^2 + 2168^2 .

It is a cyclic number.

It is not a de Polignac number, because 8981315249 - 2¹⁶ = 8981249713 is a prime.

Together with 8981315251, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8981315197 and 8981315206.

It is not a weakly prime, because it can be changed into another prime (8981315279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4490657624 + 4490657625.

It is an arithmetic number, because the mean of its divisors is an integer number (4490657625).

Almost surely, 2^8981315249 is an apocalyptic number.

It is an amenable number.

8981315249 is a deficient number, since it is larger than the sum of its proper divisors (1).

8981315249 is an equidigital number, since it uses as much as digits as its factorization.

8981315249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 50.

The square root of 8981315249 is about 94769.8013557061. The cubic root of 8981315249 is about 2078.6433498813.

The spelling of 8981315249 in words is "eight billion, nine hundred eighty-one million, three hundred fifteen thousand, two hundred forty-nine".