84947248657 has 2 divisors, whose sum is σ = 84947248658. Its totient is φ = 84947248656.

The previous prime is 84947248583. The next prime is 84947248669. The reversal of 84947248657 is 75684274948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46283498496 + 38663750161 = 215136^2 + 196631^2 .

It is a cyclic number.

It is not a de Polignac number, because 84947248657 - 2²³ = 84938860049 is a prime.

It is not a weakly prime, because it can be changed into another prime (84947248357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42473624328 + 42473624329.

It is an arithmetic number, because the mean of its divisors is an integer number (42473624329).

Almost surely, 2^84947248657 is an apocalyptic number.

It is an amenable number.

84947248657 is a deficient number, since it is larger than the sum of its proper divisors (1).

84947248657 is an equidigital number, since it uses as much as digits as its factorization.

84947248657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108380160, while the sum is 64.

The spelling of 84947248657 in words is "eighty-four billion, nine hundred forty-seven million, two hundred forty-eight thousand, six hundred fifty-seven".