89405 has 4 divisors (see below), whose sum is σ = 107292. Its totient is φ = 71520.

The previous prime is 89399. The next prime is 89413. The reversal of 89405 is 50498.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32761 + 56644 = 181^2 + 238^2 .

It is not a de Polignac number, because 89405 - 2¹⁶ = 23869 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8936 + ... + 8945.

It is an arithmetic number, because the mean of its divisors is an integer number (26823).

2⁸⁹⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

89405 is a deficient number, since it is larger than the sum of its proper divisors (17887).

89405 is a wasteful number, since it uses less digits than its factorization.

89405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17886.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 89405 is about 299.0066888884. The cubic root of 89405 is about 44.7150721494.

It can be divided in two parts, 89 and 405, that added together give a palindrome (494).

The spelling of 89405 in words is "eighty-nine thousand, four hundred five".