12209813 has 16 divisors (see below), whose sum is σ = 15306624. Its totient is φ = 9461760.

The previous prime is 12209809. The next prime is 12209819. The reversal of 12209813 is 31890221.

It is not a de Polignac number, because 12209813 - 2² = 12209809 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 (12209819) 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 15 ways as a sum of consecutive naturals, for example, 19481 + ... + 20097.

It is an arithmetic number, because the mean of its divisors is an integer number (956664).

Almost surely, 2^12209813 is an apocalyptic number.

It is an amenable number.

12209813 is a deficient number, since it is larger than the sum of its proper divisors (3096811).

12209813 is a wasteful number, since it uses less digits than its factorization.

12209813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 12209813 is about 3494.2542838208. The cubic root of 12209813 is about 230.2694573499.

The spelling of 12209813 in words is "twelve million, two hundred nine thousand, eight hundred thirteen".