10209309 has 16 divisors (see below), whose sum is σ = 15496704. Its totient is φ = 5918000.

The previous prime is 10209307. The next prime is 10209313. The reversal of 10209309 is 90390201.

It is a happy number.

10209309 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10209309 - 2¹ = 10209307 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10209307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5967 + ... + 7484.

It is an arithmetic number, because the mean of its divisors is an integer number (968544).

Almost surely, 2^10209309 is an apocalyptic number.

It is an amenable number.

10209309 is a deficient number, since it is larger than the sum of its proper divisors (5287395).

10209309 is a wasteful number, since it uses less digits than its factorization.

10209309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13488.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 10209309 is about 3195.2009326488. The cubic root of 10209309 is about 216.9362438081.

The spelling of 10209309 in words is "ten million, two hundred nine thousand, three hundred nine".