89491217 has 2 divisors, whose sum is σ = 89491218. Its totient is φ = 89491216.

The previous prime is 89491201. The next prime is 89491231. The reversal of 89491217 is 71219498.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46771921 + 42719296 = 6839^2 + 6536^2 .

It is a cyclic number.

It is not a de Polignac number, because 89491217 - 2⁴ = 89491201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89491267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44745608 + 44745609.

It is an arithmetic number, because the mean of its divisors is an integer number (44745609).

Almost surely, 2^89491217 is an apocalyptic number.

It is an amenable number.

89491217 is a deficient number, since it is larger than the sum of its proper divisors (1).

89491217 is an equidigital number, since it uses as much as digits as its factorization.

89491217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 41.

The square root of 89491217 is about 9459.9797568494. The cubic root of 89491217 is about 447.2944107284.

The spelling of 89491217 in words is "eighty-nine million, four hundred ninety-one thousand, two hundred seventeen".