200902009 has 24 divisors (see below), whose sum is σ = 261194976. Its totient is φ = 152712000.

The previous prime is 200902007. The next prime is 200902043. The reversal of 200902009 is 900209002.

It is not a de Polignac number, because 200902009 - 2¹ = 200902007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (200902001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17554 + ... + 26644.

It is an arithmetic number, because the mean of its divisors is an integer number (10883124).

Almost surely, 2^200902009 is an apocalyptic number.

It is an amenable number.

200902009 is a deficient number, since it is larger than the sum of its proper divisors (60292967).

200902009 is a wasteful number, since it uses less digits than its factorization.

200902009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9157 (or 9150 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 200902009 is about 14173.9905813430. The cubic root of 200902009 is about 585.6813926940.

Adding to 200902009 its reverse (900209002), we get a palindrome (1101111011).

It can be divided in two parts, 200 and 902009, that added together give a palindrome (902209).

The spelling of 200902009 in words is "two hundred million, nine hundred two thousand, nine".