202004009 has 4 divisors (see below), whose sum is σ = 210786816. Its totient is φ = 193221204.

The previous prime is 202004003. The next prime is 202004021. The reversal of 202004009 is 900400202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202004009 - 2¹² = 201999913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202004003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4391369 + ... + 4391414.

It is an arithmetic number, because the mean of its divisors is an integer number (52696704).

Almost surely, 2^202004009 is an apocalyptic number.

It is an amenable number.

202004009 is a deficient number, since it is larger than the sum of its proper divisors (8782807).

202004009 is an equidigital number, since it uses as much as digits as its factorization.

202004009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8782806.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 202004009 is about 14212.8114389800. The cubic root of 202004009 is about 586.7503124464.

The spelling of 202004009 in words is "two hundred two million, four thousand, nine".