404093 has 4 divisors (see below), whose sum is σ = 405408. Its totient is φ = 402780.

The previous prime is 404081. The next prime is 404099. The reversal of 404093 is 390404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 404093 - 2⁶ = 404029 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404099) by changing a digit.

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, 80 + ... + 902.

It is an arithmetic number, because the mean of its divisors is an integer number (101352).

2⁴⁰⁴⁰⁹³ is an apocalyptic number.

It is an amenable number.

404093 is a deficient number, since it is larger than the sum of its proper divisors (1315).

404093 is an equidigital number, since it uses as much as digits as its factorization.

404093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 404093 is about 635.6830971483. The cubic root of 404093 is about 73.9310899769.

Adding to 404093 its reverse (390404), we get a palindrome (794497).

Subtracting from 404093 its reverse (390404), we obtain a square (13689 = 117²).

The spelling of 404093 in words is "four hundred four thousand, ninety-three".