89945321 has 2 divisors, whose sum is σ = 89945322. Its totient is φ = 89945320.

The previous prime is 89945311. The next prime is 89945329. The reversal of 89945321 is 12354998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46240000 + 43705321 = 6800^2 + 6611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89945321 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 (89945329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44972660 + 44972661.

It is an arithmetic number, because the mean of its divisors is an integer number (44972661).

Almost surely, 2^89945321 is an apocalyptic number.

It is an amenable number.

89945321 is a deficient number, since it is larger than the sum of its proper divisors (1).

89945321 is an equidigital number, since it uses as much as digits as its factorization.

89945321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 89945321 is about 9483.9507063249. The cubic root of 89945321 is about 448.0497011850.

The spelling of 89945321 in words is "eighty-nine million, nine hundred forty-five thousand, three hundred twenty-one".