89851 has 4 divisors (see below), whose sum is σ = 94600. Its totient is φ = 85104.

The previous prime is 89849. The next prime is 89867. The reversal of 89851 is 15898.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15898 = 2 ⋅7949.

It is a cyclic number.

It is not a de Polignac number, because 89851 - 2¹ = 89849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2346 + ... + 2383.

It is an arithmetic number, because the mean of its divisors is an integer number (23650).

2⁸⁹⁸⁵¹ is an apocalyptic number.

89851 is a deficient number, since it is larger than the sum of its proper divisors (4749).

89851 is a wasteful number, since it uses less digits than its factorization.

89851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4748.

The product of its digits is 2880, while the sum is 31.

The square root of 89851 is about 299.7515637991. The cubic root of 89851 is about 44.7893030902.

It can be divided in two parts, 898 and 51, that added together give a palindrome (949).

The spelling of 89851 in words is "eighty-nine thousand, eight hundred fifty-one".