89861 has 4 divisors (see below), whose sum is σ = 93792. Its totient is φ = 85932.

The previous prime is 89849. The next prime is 89867. The reversal of 89861 is 16898.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 89861 - 2⁶ = 89797 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1931 + ... + 1976.

It is an arithmetic number, because the mean of its divisors is an integer number (23448).

2⁸⁹⁸⁶¹ is an apocalyptic number.

It is an amenable number.

89861 is a deficient number, since it is larger than the sum of its proper divisors (3931).

89861 is a wasteful number, since it uses less digits than its factorization.

89861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3930.

The product of its digits is 3456, while the sum is 32.

The square root of 89861 is about 299.7682438151. The cubic root of 89861 is about 44.7909646426.

It can be divided in two parts, 898 and 61, that added together give a palindrome (959).

The spelling of 89861 in words is "eighty-nine thousand, eight hundred sixty-one".