89685221 has 2 divisors, whose sum is σ = 89685222. Its totient is φ = 89685220.

The previous prime is 89685191. The next prime is 89685223. The reversal of 89685221 is 12258698.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74200996 + 15484225 = 8614^2 + 3935^2 .

It is a cyclic number.

It is not a de Polignac number, because 89685221 - 2⁶ = 89685157 is a prime.

Together with 89685223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89685223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44842610 + 44842611.

It is an arithmetic number, because the mean of its divisors is an integer number (44842611).

Almost surely, 2^89685221 is an apocalyptic number.

It is an amenable number.

89685221 is a deficient number, since it is larger than the sum of its proper divisors (1).

89685221 is an equidigital number, since it uses as much as digits as its factorization.

89685221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 41.

The square root of 89685221 is about 9470.2281387515. The cubic root of 89685221 is about 447.6174006135.

The spelling of 89685221 in words is "eighty-nine million, six hundred eighty-five thousand, two hundred twenty-one".