7981345247 has 2 divisors, whose sum is σ = 7981345248. Its totient is φ = 7981345246.

The previous prime is 7981345231. The next prime is 7981345261. The reversal of 7981345247 is 7425431897.

7981345247 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7981345247 - 2⁴ = 7981345231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7981345195 and 7981345204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7981345277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3990672623 + 3990672624.

It is an arithmetic number, because the mean of its divisors is an integer number (3990672624).

Almost surely, 2^7981345247 is an apocalyptic number.

7981345247 is a deficient number, since it is larger than the sum of its proper divisors (1).

7981345247 is an equidigital number, since it uses as much as digits as its factorization.

7981345247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 50.

The square root of 7981345247 is about 89338.3749964146. The cubic root of 7981345247 is about 1998.4442273495. Note that the first 3 decimals are identical.

The spelling of 7981345247 in words is "seven billion, nine hundred eighty-one million, three hundred forty-five thousand, two hundred forty-seven".