200405423 has 4 divisors (see below), whose sum is σ = 200437560. Its totient is φ = 200373288.

The previous prime is 200405389. The next prime is 200405461. The reversal of 200405423 is 324504002.

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 200405423 - 2¹⁴ = 200389039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200405395 and 200405404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200405473) 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, 3368 + ... + 20301.

It is an arithmetic number, because the mean of its divisors is an integer number (50109390).

Almost surely, 2^200405423 is an apocalyptic number.

200405423 is a deficient number, since it is larger than the sum of its proper divisors (32137).

200405423 is an equidigital number, since it uses as much as digits as its factorization.

200405423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32136.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 200405423 is about 14156.4622346121. The cubic root of 200405423 is about 585.1984356160.

Adding to 200405423 its reverse (324504002), we get a palindrome (524909425).

The spelling of 200405423 in words is "two hundred million, four hundred five thousand, four hundred twenty-three".