89359681 has 2 divisors, whose sum is σ = 89359682. Its totient is φ = 89359680.

The previous prime is 89359651. The next prime is 89359687. The reversal of 89359681 is 18695398.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61481281 + 27878400 = 7841^2 + 5280^2 .

It is a cyclic number.

It is not a de Polignac number, because 89359681 - 2⁷ = 89359553 is a prime.

It is a super-2 number, since 2×89359681² = 15970305176843522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (89359687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44679840 + 44679841.

It is an arithmetic number, because the mean of its divisors is an integer number (44679841).

Almost surely, 2^89359681 is an apocalyptic number.

It is an amenable number.

89359681 is a deficient number, since it is larger than the sum of its proper divisors (1).

89359681 is an equidigital number, since it uses as much as digits as its factorization.

89359681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 49.

The square root of 89359681 is about 9453.0249655864. The cubic root of 89359681 is about 447.0751558156.

The spelling of 89359681 in words is "eighty-nine million, three hundred fifty-nine thousand, six hundred eighty-one".