89811 has 12 divisors (see below), whose sum is σ = 137592. Its totient is φ = 56256.

The previous prime is 89809. The next prime is 89819. The reversal of 89811 is 11898.

It is not a de Polignac number, because 89811 - 2¹ = 89809 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 89811.

It is not an unprimeable number, because it can be changed into a prime (89819) 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 in 11 ways as a sum of consecutive naturals, for example, 141 + ... + 446.

It is an arithmetic number, because the mean of its divisors is an integer number (11466).

2⁸⁹⁸¹¹ is an apocalyptic number.

89811 is a deficient number, since it is larger than the sum of its proper divisors (47781).

89811 is a wasteful number, since it uses less digits than its factorization.

89811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610 (or 607 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 89811 is about 299.6848344511. The cubic root of 89811 is about 44.7826556478.

It can be divided in two parts, 898 and 11, that added together give a palindrome (909).

The spelling of 89811 in words is "eighty-nine thousand, eight hundred eleven".