86543321 has 2 divisors, whose sum is σ = 86543322. Its totient is φ = 86543320.

The previous prime is 86543293. The next prime is 86543339. The reversal of 86543321 is 12334568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85470025 + 1073296 = 9245^2 + 1036^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86543321 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (86543921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43271660 + 43271661.

It is an arithmetic number, because the mean of its divisors is an integer number (43271661).

Almost surely, 2^86543321 is an apocalyptic number.

It is an amenable number.

86543321 is a deficient number, since it is larger than the sum of its proper divisors (1).

86543321 is an equidigital number, since it uses as much as digits as its factorization.

86543321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 86543321 is about 9302.8662787337. The cubic root of 86543321 is about 442.3280888172.

Adding to 86543321 its reverse (12334568), we get a palindrome (98877889).

The spelling of 86543321 in words is "eighty-six million, five hundred forty-three thousand, three hundred twenty-one".