200404423 has 4 divisors (see below), whose sum is σ = 201117888. Its totient is φ = 199690960.

The previous prime is 200404417. The next prime is 200404439. The reversal of 200404423 is 324404002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200404423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200404423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200404403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356311 + ... + 356872.

It is an arithmetic number, because the mean of its divisors is an integer number (50279472).

Almost surely, 2^200404423 is an apocalyptic number.

200404423 is a deficient number, since it is larger than the sum of its proper divisors (713465).

200404423 is an equidigital number, since it uses as much as digits as its factorization.

200404423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713464.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 200404423 is about 14156.4269150093. The cubic root of 200404423 is about 585.1974622568.

Adding to 200404423 its reverse (324404002), we get a palindrome (524808425).

The spelling of 200404423 in words is "two hundred million, four hundred four thousand, four hundred twenty-three".