404242343 has 4 divisors (see below), whose sum is σ = 404305560. Its totient is φ = 404179128.

The previous prime is 404242313. The next prime is 404242351. The reversal of 404242343 is 343242404.

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 404242343 - 2¹⁴ = 404225959 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 (404242313) 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, 20780 + ... + 35217.

It is an arithmetic number, because the mean of its divisors is an integer number (101076390).

Almost surely, 2^404242343 is an apocalyptic number.

404242343 is a deficient number, since it is larger than the sum of its proper divisors (63217).

404242343 is an equidigital number, since it uses as much as digits as its factorization.

404242343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63216.

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 404242343 is about 20105.7788458940. The cubic root of 404242343 is about 739.4019656939.

Adding to 404242343 its reverse (343242404), we get a palindrome (747484747).

The spelling of 404242343 in words is "four hundred four million, two hundred forty-two thousand, three hundred forty-three".