200109 has 16 divisors (see below), whose sum is σ = 328832. Its totient is φ = 105408.

The previous prime is 200087. The next prime is 200117. The reversal of 200109 is 901002.

It is a happy number.

200109 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 200109 - 2⁸ = 199853 is a prime.

It is a super-2 number, since 2×200109² = 80087223762, which contains 22 as substring.

200109 is an undulating number in base 12.

200109 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 200094 and 200103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94 + ... + 639.

It is an arithmetic number, because the mean of its divisors is an integer number (20552).

2²⁰⁰¹⁰⁹ is an apocalyptic number.

It is an amenable number.

200109 is a deficient number, since it is larger than the sum of its proper divisors (128723).

200109 is a wasteful number, since it uses less digits than its factorization.

200109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 200109 is about 447.3354446051. The cubic root of 200109 is about 58.4909767659.

The spelling of 200109 in words is "two hundred thousand, one hundred nine".