86208089621 has 2 divisors, whose sum is σ = 86208089622. Its totient is φ = 86208089620.

The previous prime is 86208089573. The next prime is 86208089623. The reversal of 86208089621 is 12698080268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71443409521 + 14764680100 = 267289^2 + 121510^2 .

It is a cyclic number.

It is not a de Polignac number, because 86208089621 - 2¹⁸ = 86207827477 is a prime.

It is a super-2 number, since 2×86208089621² (a number of 23 digits) contains 22 as substring.

Together with 86208089623, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86208089621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86208089623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43104044810 + 43104044811.

It is an arithmetic number, because the mean of its divisors is an integer number (43104044811).

Almost surely, 2^86208089621 is an apocalyptic number.

It is an amenable number.

86208089621 is a deficient number, since it is larger than the sum of its proper divisors (1).

86208089621 is an equidigital number, since it uses as much as digits as its factorization.

86208089621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 663552, while the sum is 50.

The spelling of 86208089621 in words is "eighty-six billion, two hundred eight million, eighty-nine thousand, six hundred twenty-one".