202000009 has 4 divisors (see below), whose sum is σ = 202139920. Its totient is φ = 201860100.

The previous prime is 202000003. The next prime is 202000021. The reversal of 202000009 is 900000202.

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 a de Polignac number, because none of the positive numbers 2^k-202000009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202000003) 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, 67767 + ... + 70684.

It is an arithmetic number, because the mean of its divisors is an integer number (50534980).

Almost surely, 2^202000009 is an apocalyptic number.

It is an amenable number.

202000009 is a deficient number, since it is larger than the sum of its proper divisors (139911).

202000009 is a wasteful number, since it uses less digits than its factorization.

202000009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139910.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 202000009 is about 14212.6707201708. The cubic root of 202000009 is about 586.7464395583.

The spelling of 202000009 in words is "two hundred two million, nine", and thus it is an aban number.