90118 has 16 divisors (see below), whose sum is σ = 159264. Its totient is φ = 37440.

The previous prime is 90107. The next prime is 90121. The reversal of 90118 is 81109.

It is a junction number, because it is equal to n+sod(n) for n = 90095 and 90104.

It is a congruent number.

It is an unprimeable number.

90118 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496 + ... + 652.

It is an arithmetic number, because the mean of its divisors is an integer number (9954).

2⁹⁰¹¹⁸ is an apocalyptic number.

90118 is a deficient number, since it is larger than the sum of its proper divisors (69146).

90118 is a wasteful number, since it uses less digits than its factorization.

90118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 90118 is about 300.1966022459. The cubic root of 90118 is about 44.8336243108.

Subtracting from 90118 its reverse (81109), we obtain a palindrome (9009).

It can be divided in two parts, 901 and 18, that added together give a palindrome (919).

The spelling of 90118 in words is "ninety thousand, one hundred eighteen".