89645221 has 2 divisors, whose sum is σ = 89645222. Its totient is φ = 89645220.

The previous prime is 89645209. The next prime is 89645243. The reversal of 89645221 is 12254698.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60062500 + 29582721 = 7750^2 + 5439^2 .

It is a cyclic number.

It is not a de Polignac number, because 89645221 - 2⁵ = 89645189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89645261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44822610 + 44822611.

It is an arithmetic number, because the mean of its divisors is an integer number (44822611).

Almost surely, 2^89645221 is an apocalyptic number.

It is an amenable number.

89645221 is a deficient number, since it is larger than the sum of its proper divisors (1).

89645221 is an equidigital number, since it uses as much as digits as its factorization.

89645221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 89645221 is about 9468.1160216803. The cubic root of 89645221 is about 447.5508442796.

The spelling of 89645221 in words is "eighty-nine million, six hundred forty-five thousand, two hundred twenty-one".