1000003309 has 2 divisors, whose sum is σ = 1000003310. Its totient is φ = 1000003308.

The previous prime is 1000003283. The next prime is 1000003337. The reversal of 1000003309 is 9033000001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 761208100 + 238795209 = 27590^2 + 15453^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000003309 - 2²⁵ = 966448877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000003292 and 1000003301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000003379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500001654 + 500001655.

It is an arithmetic number, because the mean of its divisors is an integer number (500001655).

Almost surely, 2^1000003309 is an apocalyptic number.

It is an amenable number.

1000003309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000003309 is an equidigital number, since it uses as much as digits as its factorization.

1000003309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 1000003309 is about 31622.8289215244. The cubic root of 1000003309 is about 1000.0011029988.

The spelling of 1000003309 in words is "one billion, three thousand, three hundred nine".