8178822947 has 2 divisors, whose sum is σ = 8178822948. Its totient is φ = 8178822946.

The previous prime is 8178822937. The next prime is 8178822989. The reversal of 8178822947 is 7492288718.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8178822947 - 2²⁸ = 7910387491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8178822892 and 8178822901.

It is not a weakly prime, because it can be changed into another prime (8178822917) 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, 4089411473 + 4089411474.

It is an arithmetic number, because the mean of its divisors is an integer number (4089411474).

Almost surely, 2^8178822947 is an apocalyptic number.

8178822947 is a deficient number, since it is larger than the sum of its proper divisors (1).

8178822947 is an equidigital number, since it uses as much as digits as its factorization.

8178822947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3612672, while the sum is 56.

The square root of 8178822947 is about 90436.8450743390. The cubic root of 8178822947 is about 2014.7922373821.

The spelling of 8178822947 in words is "eight billion, one hundred seventy-eight million, eight hundred twenty-two thousand, nine hundred forty-seven".