89971 has 4 divisors (see below), whose sum is σ = 102832. Its totient is φ = 77112.

The previous prime is 89963. The next prime is 89977. The reversal of 89971 is 17998.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17998 = 2 ⋅8999.

It is not a de Polignac number, because 89971 - 2³ = 89963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89977) 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, 6420 + ... + 6433.

It is an arithmetic number, because the mean of its divisors is an integer number (25708).

2⁸⁹⁹⁷¹ is an apocalyptic number.

89971 is a deficient number, since it is larger than the sum of its proper divisors (12861).

89971 is a wasteful number, since it uses less digits than its factorization.

89971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12860.

The product of its digits is 4536, while the sum is 34.

The square root of 89971 is about 299.9516627725. The cubic root of 89971 is about 44.8092335878.

It can be divided in two parts, 8997 and 1, that added together give a palindrome (8998).

The spelling of 89971 in words is "eighty-nine thousand, nine hundred seventy-one".