84968042657 has 2 divisors, whose sum is σ = 84968042658. Its totient is φ = 84968042656.

The previous prime is 84968042611. The next prime is 84968042671. The reversal of 84968042657 is 75624086948.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77106737761 + 7861304896 = 277681^2 + 88664^2 .

It is a cyclic number.

It is not a de Polignac number, because 84968042657 - 2²⁰ = 84966994081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84968042596 and 84968042605.

It is not a weakly prime, because it can be changed into another prime (84968042557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42484021328 + 42484021329.

It is an arithmetic number, because the mean of its divisors is an integer number (42484021329).

Almost surely, 2^84968042657 is an apocalyptic number.

It is an amenable number.

84968042657 is a deficient number, since it is larger than the sum of its proper divisors (1).

84968042657 is an equidigital number, since it uses as much as digits as its factorization.

84968042657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23224320, while the sum is 59.

The spelling of 84968042657 in words is "eighty-four billion, nine hundred sixty-eight million, forty-two thousand, six hundred fifty-seven".