89618 has 4 divisors (see below), whose sum is σ = 134430. Its totient is φ = 44808.

The previous prime is 89611. The next prime is 89627. The reversal of 89618 is 81698.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81698 = 2 ⋅40849.

It can be written as a sum of positive squares in only one way, i.e., 69169 + 20449 = 263^2 + 143^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (89611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22403 + ... + 22406.

2⁸⁹⁶¹⁸ is an apocalyptic number.

89618 is a deficient number, since it is larger than the sum of its proper divisors (44812).

89618 is a wasteful number, since it uses less digits than its factorization.

89618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44811.

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

The square root of 89618 is about 299.3626563217. The cubic root of 89618 is about 44.7505539709.

It can be divided in two parts, 89 and 618, that added together give a palindrome (707).

The spelling of 89618 in words is "eighty-nine thousand, six hundred eighteen".