8347981819 has 2 divisors, whose sum is σ = 8347981820. Its totient is φ = 8347981818.

The previous prime is 8347981783. The next prime is 8347981841. The reversal of 8347981819 is 9181897438.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8347981819 - 2²⁹ = 7811110907 is a prime.

It is a super-2 number, since 2×8347981819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8347981879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4173990909 + 4173990910.

It is an arithmetic number, because the mean of its divisors is an integer number (4173990910).

Almost surely, 2^8347981819 is an apocalyptic number.

8347981819 is a deficient number, since it is larger than the sum of its proper divisors (1).

8347981819 is an equidigital number, since it uses as much as digits as its factorization.

8347981819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 58.

The square root of 8347981819 is about 91367.2907500272. The cubic root of 8347981819 is about 2028.5879037961.

The spelling of 8347981819 in words is "eight billion, three hundred forty-seven million, nine hundred eighty-one thousand, eight hundred nineteen".