404623 has 4 divisors (see below), whose sum is σ = 413280. Its totient is φ = 395968.

The previous prime is 404597. The next prime is 404671. The reversal of 404623 is 326404.

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

It is a cyclic number.

It is not a de Polignac number, because 404623 - 2¹⁷ = 273551 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11 and base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 404623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4258 + ... + 4351.

It is an arithmetic number, because the mean of its divisors is an integer number (103320).

2⁴⁰⁴⁶²³ is an apocalyptic number.

404623 is a deficient number, since it is larger than the sum of its proper divisors (8657).

404623 is an equidigital number, since it uses as much as digits as its factorization.

404623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8656.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 404623 is about 636.0998349316. The cubic root of 404623 is about 73.9633980177.

The spelling of 404623 in words is "four hundred four thousand, six hundred twenty-three".