12808137 has 4 divisors (see below), whose sum is σ = 17077520. Its totient is φ = 8538756.

The previous prime is 12808129. The next prime is 12808141. The reversal of 12808137 is 73180821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12808137 - 2³ = 12808129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12808637) 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, 2134687 + ... + 2134692.

It is an arithmetic number, because the mean of its divisors is an integer number (4269380).

Almost surely, 2^12808137 is an apocalyptic number.

It is an amenable number.

12808137 is a deficient number, since it is larger than the sum of its proper divisors (4269383).

12808137 is an equidigital number, since it uses as much as digits as its factorization.

12808137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4269382.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 12808137 is about 3578.8457636506. The cubic root of 12808137 is about 233.9709767496.

Adding to 12808137 its reverse (73180821), we get a palindrome (85988958).

The spelling of 12808137 in words is "twelve million, eight hundred eight thousand, one hundred thirty-seven".