8765432321 has 2 divisors, whose sum is σ = 8765432322. Its totient is φ = 8765432320.

The previous prime is 8765432293. The next prime is 8765432341. The reversal of 8765432321 is 1232345678.

8765432321 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7066756096 + 1698676225 = 84064^2 + 41215^2 .

It is a cyclic number.

It is not a de Polignac number, because 8765432321 - 2¹⁴ = 8765415937 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (8765432341) 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, 4382716160 + 4382716161.

It is an arithmetic number, because the mean of its divisors is an integer number (4382716161).

Almost surely, 2^8765432321 is an apocalyptic number.

It is an amenable number.

8765432321 is a deficient number, since it is larger than the sum of its proper divisors (1).

8765432321 is an equidigital number, since it uses as much as digits as its factorization.

8765432321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 41.

The square root of 8765432321 is about 93623.8875554738. The cubic root of 8765432321 is about 2061.8533859686.

Adding to 8765432321 its reverse (1232345678), we get a palindrome (9997777999).

The spelling of 8765432321 in words is "eight billion, seven hundred sixty-five million, four hundred thirty-two thousand, three hundred twenty-one".