89316281 has 2 divisors, whose sum is σ = 89316282. Its totient is φ = 89316280.

The previous prime is 89316223. The next prime is 89316307. The reversal of 89316281 is 18261398.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73188025 + 16128256 = 8555^2 + 4016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89316281 is a prime.

It is a super-2 number, since 2×89316281² = 15954796103341922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (89316211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44658140 + 44658141.

It is an arithmetic number, because the mean of its divisors is an integer number (44658141).

Almost surely, 2^89316281 is an apocalyptic number.

It is an amenable number.

89316281 is a deficient number, since it is larger than the sum of its proper divisors (1).

89316281 is an equidigital number, since it uses as much as digits as its factorization.

89316281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 89316281 is about 9450.7291253109. The cubic root of 89316281 is about 447.0027659577.

The spelling of 89316281 in words is "eighty-nine million, three hundred sixteen thousand, two hundred eighty-one".