10303209 has 12 divisors (see below), whose sum is σ = 17008576. Its totient is φ = 5887512.

The previous prime is 10303171. The next prime is 10303211. The reversal of 10303209 is 90230301.

It is not a de Polignac number, because 10303209 - 2¹⁵ = 10270441 is a prime.

It is a super-2 number, since 2×10303209² = 212312231395362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10303191 and 10303200.

It is not an unprimeable number, because it can be changed into a prime (10303289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81709 + ... + 81834.

Almost surely, 2^10303209 is an apocalyptic number.

It is an amenable number.

10303209 is a deficient number, since it is larger than the sum of its proper divisors (6705367).

10303209 is a wasteful number, since it uses less digits than its factorization.

10303209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163556 (or 163553 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 10303209 is about 3209.8612119529. The cubic root of 10303209 is about 217.5993046335.

The spelling of 10303209 in words is "ten million, three hundred three thousand, two hundred nine".