84687827117 has 2 divisors, whose sum is σ = 84687827118. Its totient is φ = 84687827116.

The previous prime is 84687827101. The next prime is 84687827123. The reversal of 84687827117 is 71172878648.

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., 83143415716 + 1544411401 = 288346^2 + 39299^2 .

It is a cyclic number.

It is not a de Polignac number, because 84687827117 - 2⁴ = 84687827101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84687827137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42343913558 + 42343913559.

It is an arithmetic number, because the mean of its divisors is an integer number (42343913559).

Almost surely, 2^84687827117 is an apocalyptic number.

It is an amenable number.

84687827117 is a deficient number, since it is larger than the sum of its proper divisors (1).

84687827117 is an equidigital number, since it uses as much as digits as its factorization.

84687827117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8429568, while the sum is 59.

The spelling of 84687827117 in words is "eighty-four billion, six hundred eighty-seven million, eight hundred twenty-seven thousand, one hundred seventeen".