12038809 has 4 divisors (see below), whose sum is σ = 12047140. Its totient is φ = 12030480.

The previous prime is 12038797. The next prime is 12038813. The reversal of 12038809 is 90883021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90883021 = 67 ⋅1356463.

It can be written as a sum of positive squares in 2 ways, for example, as 205209 + 11833600 = 453^2 + 3440^2 .

It is a cyclic number.

It is not a de Polignac number, because 12038809 - 2¹⁵ = 12006041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12038879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1374 + ... + 5095.

It is an arithmetic number, because the mean of its divisors is an integer number (3011785).

Almost surely, 2^12038809 is an apocalyptic number.

It is an amenable number.

12038809 is a deficient number, since it is larger than the sum of its proper divisors (8331).

12038809 is an equidigital number, since it uses as much as digits as its factorization.

12038809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8330.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 12038809 is about 3469.6986900882. The cubic root of 12038809 is about 229.1893896734.

The spelling of 12038809 in words is "twelve million, thirty-eight thousand, eight hundred nine".