7842973484977 has 2 divisors, whose sum is σ = 7842973484978. Its totient is φ = 7842973484976.

The previous prime is 7842973484963. The next prime is 7842973484981. The reversal of 7842973484977 is 7794843792487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7579097096256 + 263876388721 = 2753016^2 + 513689^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7842973484977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7842973484897 and 7842973484906.

It is not a weakly prime, because it can be changed into another prime (7842973484777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3921486742488 + 3921486742489.

It is an arithmetic number, because the mean of its divisors is an integer number (3921486742489).

Almost surely, 2^{7842973484977} is an apocalyptic number.

It is an amenable number.

7842973484977 is a deficient number, since it is larger than the sum of its proper divisors (1).

7842973484977 is an equidigital number, since it uses as much as digits as its factorization.

7842973484977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4779565056, while the sum is 79.

The spelling of 7842973484977 in words is "seven trillion, eight hundred forty-two billion, nine hundred seventy-three million, four hundred eighty-four thousand, nine hundred seventy-seven".