404653 has 4 divisors (see below), whose sum is σ = 408348. Its totient is φ = 400960.

The previous prime is 404597. The next prime is 404671. The reversal of 404653 is 356404.

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 161604 + 243049 = 402^2 + 493^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404653 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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, 1678 + ... + 1903.

It is an arithmetic number, because the mean of its divisors is an integer number (102087).

2⁴⁰⁴⁶⁵³ is an apocalyptic number.

It is an amenable number.

404653 is a deficient number, since it is larger than the sum of its proper divisors (3695).

404653 is a wasteful number, since it uses less digits than its factorization.

404653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3694.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 404653 is about 636.1234156986. The cubic root of 404653 is about 73.9652259308.

The spelling of 404653 in words is "four hundred four thousand, six hundred fifty-three".