89665321 has 2 divisors, whose sum is σ = 89665322. Its totient is φ = 89665320.

The previous prime is 89665249. The next prime is 89665333. The reversal of 89665321 is 12356698.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54096025 + 35569296 = 7355^2 + 5964^2 .

It is a cyclic number.

It is not a de Polignac number, because 89665321 - 2⁷ = 89665193 is a prime.

It is not a weakly prime, because it can be changed into another prime (89665721) 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, 44832660 + 44832661.

It is an arithmetic number, because the mean of its divisors is an integer number (44832661).

Almost surely, 2^89665321 is an apocalyptic number.

It is an amenable number.

89665321 is a deficient number, since it is larger than the sum of its proper divisors (1).

89665321 is an equidigital number, since it uses as much as digits as its factorization.

89665321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 89665321 is about 9469.1774193960. The cubic root of 89665321 is about 447.5842913116.

The spelling of 89665321 in words is "eighty-nine million, six hundred sixty-five thousand, three hundred twenty-one".