86790221321 has 2 divisors, whose sum is σ = 86790221322. Its totient is φ = 86790221320.

The previous prime is 86790221257. The next prime is 86790221381. The reversal of 86790221321 is 12312209768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76709057296 + 10081164025 = 276964^2 + 100405^2 .

It is a cyclic number.

It is not a de Polignac number, because 86790221321 - 2⁶ = 86790221257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (86790221381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43395110660 + 43395110661.

It is an arithmetic number, because the mean of its divisors is an integer number (43395110661).

Almost surely, 2^86790221321 is an apocalyptic number.

It is an amenable number.

86790221321 is a deficient number, since it is larger than the sum of its proper divisors (1).

86790221321 is an equidigital number, since it uses as much as digits as its factorization.

86790221321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 86790221321 in words is "eighty-six billion, seven hundred ninety million, two hundred twenty-one thousand, three hundred twenty-one".