87680321 has 2 divisors, whose sum is σ = 87680322. Its totient is φ = 87680320.

The previous prime is 87680303. The next prime is 87680357. The reversal of 87680321 is 12308678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50908225 + 36772096 = 7135^2 + 6064^2 .

It is a cyclic number.

It is not a de Polignac number, because 87680321 - 2¹⁴ = 87663937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87680371) 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, 43840160 + 43840161.

It is an arithmetic number, because the mean of its divisors is an integer number (43840161).

Almost surely, 2^87680321 is an apocalyptic number.

It is an amenable number.

87680321 is a deficient number, since it is larger than the sum of its proper divisors (1).

87680321 is an equidigital number, since it uses as much as digits as its factorization.

87680321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 87680321 is about 9363.7770691105. Note that the first 3 decimals coincide. The cubic root of 87680321 is about 444.2567587366.

Adding to 87680321 its reverse (12308678), we get a palindrome (99988999).

The spelling of 87680321 in words is "eighty-seven million, six hundred eighty thousand, three hundred twenty-one".