200005123 has 4 divisors (see below), whose sum is σ = 200064880. Its totient is φ = 199945368.

The previous prime is 200005121. The next prime is 200005129. The reversal of 200005123 is 321500002.

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 200005123 - 2¹ = 200005121 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (200005121) 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, 24540 + ... + 31657.

It is an arithmetic number, because the mean of its divisors is an integer number (50016220).

Almost surely, 2^200005123 is an apocalyptic number.

200005123 is a deficient number, since it is larger than the sum of its proper divisors (59757).

200005123 is an equidigital number, since it uses as much as digits as its factorization.

200005123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59756.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 200005123 is about 14142.3167479731. The cubic root of 200005123 is about 584.8085408476.

Adding to 200005123 its reverse (321500002), we get a palindrome (521505125).

The spelling of 200005123 in words is "two hundred million, five thousand, one hundred twenty-three".