2002130309 has 4 divisors (see below), whose sum is σ = 2003867916. Its totient is φ = 2000392704.

The previous prime is 2002130303. The next prime is 2002130323. The reversal of 2002130309 is 9030312002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1085373025 + 916757284 = 32945^2 + 30278^2 .

It is a cyclic number.

It is not a de Polignac number, because 2002130309 - 2¹² = 2002126213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002130303) 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, 867074 + ... + 869379.

It is an arithmetic number, because the mean of its divisors is an integer number (500966979).

Almost surely, 2^2002130309 is an apocalyptic number.

It is an amenable number.

2002130309 is a deficient number, since it is larger than the sum of its proper divisors (1737607).

2002130309 is a wasteful number, since it uses less digits than its factorization.

2002130309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1737606.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 2002130309 is about 44745.1707897065. The cubic root of 2002130309 is about 1260.3682280198.

The spelling of 2002130309 in words is "two billion, two million, one hundred thirty thousand, three hundred nine".