89945 has 4 divisors (see below), whose sum is σ = 107940. Its totient is φ = 71952.

The previous prime is 89939. The next prime is 89959. The reversal of 89945 is 54998.

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 51529 + 38416 = 227^2 + 196^2 .

It is a cyclic number.

It is not a de Polignac number, because 89945 - 2⁸ = 89689 is a prime.

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, 8990 + ... + 8999.

It is an arithmetic number, because the mean of its divisors is an integer number (26985).

2⁸⁹⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

89945 is a deficient number, since it is larger than the sum of its proper divisors (17995).

89945 is a wasteful number, since it uses less digits than its factorization.

89945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17994.

The product of its digits is 12960, while the sum is 35.

The square root of 89945 is about 299.9083193244. The cubic root of 89945 is about 44.8049168179.

The spelling of 89945 in words is "eighty-nine thousand, nine hundred forty-five".