89811217 has 2 divisors, whose sum is σ = 89811218. Its totient is φ = 89811216.

The previous prime is 89811209. The next prime is 89811257. The reversal of 89811217 is 71211898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89794576 + 16641 = 9476^2 + 129^2 .

It is a cyclic number.

It is not a de Polignac number, because 89811217 - 2³ = 89811209 is a prime.

It is not a weakly prime, because it can be changed into another prime (89811257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44905608 + 44905609.

It is an arithmetic number, because the mean of its divisors is an integer number (44905609).

Almost surely, 2^89811217 is an apocalyptic number.

It is an amenable number.

89811217 is a deficient number, since it is larger than the sum of its proper divisors (1).

89811217 is an equidigital number, since it uses as much as digits as its factorization.

89811217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 37.

The square root of 89811217 is about 9476.8780196856. The cubic root of 89811217 is about 447.8269171551.

The spelling of 89811217 in words is "eighty-nine million, eight hundred eleven thousand, two hundred seventeen".