202103309 has 8 divisors (see below), whose sum is σ = 210429240. Its totient is φ = 193939200.

The previous prime is 202103299. The next prime is 202103329. The reversal of 202103309 is 903301202.

It can be written as a sum of positive squares in 4 ways, for example, as 605284 + 201498025 = 778^2 + 14195^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202103309 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 (202103329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37904 + ... + 42905.

It is an arithmetic number, because the mean of its divisors is an integer number (26303655).

Almost surely, 2^202103309 is an apocalyptic number.

It is an amenable number.

202103309 is a deficient number, since it is larger than the sum of its proper divisors (8325931).

202103309 is an equidigital number, since it uses as much as digits as its factorization.

202103309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80911.

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

The square root of 202103309 is about 14216.3043369224. The cubic root of 202103309 is about 586.8464405081.

The spelling of 202103309 in words is "two hundred two million, one hundred three thousand, three hundred nine".