404423143 has 4 divisors (see below), whose sum is σ = 405043128. Its totient is φ = 403803160.

The previous prime is 404423119. The next prime is 404423147. The reversal of 404423143 is 341324404.

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 404423143 - 2⁹ = 404422631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404423147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309013 + ... + 310318.

It is an arithmetic number, because the mean of its divisors is an integer number (101260782).

Almost surely, 2^404423143 is an apocalyptic number.

404423143 is a deficient number, since it is larger than the sum of its proper divisors (619985).

404423143 is an equidigital number, since it uses as much as digits as its factorization.

404423143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619984.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 404423143 is about 20110.2745630188. The cubic root of 404423143 is about 739.5121833660.

Adding to 404423143 its reverse (341324404), we get a palindrome (745747547).

The spelling of 404423143 in words is "four hundred four million, four hundred twenty-three thousand, one hundred forty-three".