86812507493 has 2 divisors, whose sum is σ = 86812507494. Its totient is φ = 86812507492.

The previous prime is 86812507459. The next prime is 86812507531. The reversal of 86812507493 is 39470521868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77176729249 + 9635778244 = 277807^2 + 98162^2 .

It is a cyclic number.

It is not a de Polignac number, because 86812507493 - 2⁸ = 86812507237 is a prime.

It is a super-2 number, since 2×86812507493² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86812527493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43406253746 + 43406253747.

It is an arithmetic number, because the mean of its divisors is an integer number (43406253747).

It is a 2-persistent number, because it is pandigital, and so is 2⋅86812507493 = 173625014986, but 3⋅86812507493 = 260437522479 is not.

Almost surely, 2^86812507493 is an apocalyptic number.

It is an amenable number.

86812507493 is a deficient number, since it is larger than the sum of its proper divisors (1).

86812507493 is an equidigital number, since it uses as much as digits as its factorization.

86812507493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 86812507493 in words is "eighty-six billion, eight hundred twelve million, five hundred seven thousand, four hundred ninety-three".