89318921 has 2 divisors, whose sum is σ = 89318922. Its totient is φ = 89318920.

The previous prime is 89318909. The next prime is 89318963. The reversal of 89318921 is 12981398.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86118400 + 3200521 = 9280^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 89318921 - 2⁶ = 89318857 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (89318321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44659460 + 44659461.

It is an arithmetic number, because the mean of its divisors is an integer number (44659461).

Almost surely, 2^89318921 is an apocalyptic number.

It is an amenable number.

89318921 is a deficient number, since it is larger than the sum of its proper divisors (1).

89318921 is an equidigital number, since it uses as much as digits as its factorization.

89318921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 41.

The square root of 89318921 is about 9450.8687960420. The cubic root of 89318921 is about 447.0071700658.

The spelling of 89318921 in words is "eighty-nine million, three hundred eighteen thousand, nine hundred twenty-one".