83618 has 4 divisors (see below), whose sum is σ = 125430. Its totient is φ = 41808.

The previous prime is 83617. The next prime is 83621. The reversal of 83618 is 81638.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81638 = 2 ⋅40819.

It can be written as a sum of positive squares in only one way, i.e., 76729 + 6889 = 277^2 + 83^2 .

It is an Ulam number.

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

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (83617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20903 + ... + 20906.

2⁸³⁶¹⁸ is an apocalyptic number.

83618 is a deficient number, since it is larger than the sum of its proper divisors (41812).

83618 is a wasteful number, since it uses less digits than its factorization.

83618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41811.

The product of its digits is 1152, while the sum is 26.

The square root of 83618 is about 289.1677713716. The cubic root of 83618 is about 43.7287025593.

The spelling of 83618 in words is "eighty-three thousand, six hundred eighteen".