86212808789 has 2 divisors, whose sum is σ = 86212808790. Its totient is φ = 86212808788.

The previous prime is 86212808761. The next prime is 86212808791. The reversal of 86212808789 is 98780821268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79387570564 + 6825238225 = 281758^2 + 82615^2 .

It is a cyclic number.

It is not a de Polignac number, because 86212808789 - 2³² = 81917841493 is a prime.

Together with 86212808791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86212808719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43106404394 + 43106404395.

It is an arithmetic number, because the mean of its divisors is an integer number (43106404395).

Almost surely, 2^86212808789 is an apocalyptic number.

It is an amenable number.

86212808789 is a deficient number, since it is larger than the sum of its proper divisors (1).

86212808789 is an equidigital number, since it uses as much as digits as its factorization.

86212808789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6193152, while the sum is 59.

The spelling of 86212808789 in words is "eighty-six billion, two hundred twelve million, eight hundred eight thousand, seven hundred eighty-nine".