8442847279 has 2 divisors, whose sum is σ = 8442847280. Its totient is φ = 8442847278.

The previous prime is 8442847271. The next prime is 8442847297. The reversal of 8442847279 is 9727482448.

Together with next prime (8442847297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8442847279 - 2³ = 8442847271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8442847271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4221423639 + 4221423640.

It is an arithmetic number, because the mean of its divisors is an integer number (4221423640).

Almost surely, 2^8442847279 is an apocalyptic number.

8442847279 is a deficient number, since it is larger than the sum of its proper divisors (1).

8442847279 is an equidigital number, since it uses as much as digits as its factorization.

8442847279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7225344, while the sum is 55.

The square root of 8442847279 is about 91884.9676443323. The cubic root of 8442847279 is about 2036.2431882432.

The spelling of 8442847279 in words is "eight billion, four hundred forty-two million, eight hundred forty-seven thousand, two hundred seventy-nine".