200423999 has 4 divisors (see below), whose sum is σ = 212213664. Its totient is φ = 188634336.

The previous prime is 200423969. The next prime is 200424043. The reversal of 200423999 is 999324002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999324002 = 2 ⋅499662001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200423999 is a prime.

It is a super-4 number, since 4×200423999⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200423939) 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, 5894807 + ... + 5894840.

It is an arithmetic number, because the mean of its divisors is an integer number (53053416).

Almost surely, 2^200423999 is an apocalyptic number.

200423999 is a deficient number, since it is larger than the sum of its proper divisors (11789665).

200423999 is a wasteful number, since it uses less digits than its factorization.

200423999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11789664.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 200423999 is about 14157.1183155330. The cubic root of 200423999 is about 585.2165161485.

The spelling of 200423999 in words is "two hundred million, four hundred twenty-three thousand, nine hundred ninety-nine".