85247137212493 has 2 divisors, whose sum is σ = 85247137212494. Its totient is φ = 85247137212492.

The previous prime is 85247137212439. The next prime is 85247137212557. The reversal of 85247137212493 is 39421273174258.

Together with previous prime (85247137212439) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79234156441449 + 6012980771044 = 8901357^2 + 2452138^2 .

It is a cyclic number.

It is not a de Polignac number, because 85247137212493 - 2⁹ = 85247137211981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85247137012493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42623568606246 + 42623568606247.

It is an arithmetic number, because the mean of its divisors is an integer number (42623568606247).

Almost surely, 2^{85247137212493} is an apocalyptic number.

It is an amenable number.

85247137212493 is a deficient number, since it is larger than the sum of its proper divisors (1).

85247137212493 is an equidigital number, since it uses as much as digits as its factorization.

85247137212493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20321280, while the sum is 58.

The spelling of 85247137212493 in words is "eighty-five trillion, two hundred forty-seven billion, one hundred thirty-seven million, two hundred twelve thousand, four hundred ninety-three".