8948970781 has 2 divisors, whose sum is σ = 8948970782. Its totient is φ = 8948970780.

The previous prime is 8948970773. The next prime is 8948970809. The reversal of 8948970781 is 1870798498.

It is a happy number.

8948970781 is digitally balanced in base 2, 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., 5646169881 + 3302800900 = 75141^2 + 57470^2 .

It is a cyclic number.

It is not a de Polignac number, because 8948970781 - 2³ = 8948970773 is a prime.

It is a super-2 number, since 2×8948970781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8948970181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4474485390 + 4474485391.

It is an arithmetic number, because the mean of its divisors is an integer number (4474485391).

Almost surely, 2^8948970781 is an apocalyptic number.

It is an amenable number.

8948970781 is a deficient number, since it is larger than the sum of its proper divisors (1).

8948970781 is an equidigital number, since it uses as much as digits as its factorization.

8948970781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8128512, while the sum is 61.

The square root of 8948970781 is about 94598.9998942906. Note that the first 3 decimals coincide. The cubic root of 8948970781 is about 2076.1450712616.

The spelling of 8948970781 in words is "eight billion, nine hundred forty-eight million, nine hundred seventy thousand, seven hundred eighty-one".