16808137 has 4 divisors (see below), whose sum is σ = 16892800. Its totient is φ = 16723476.

The previous prime is 16808111. The next prime is 16808159. The reversal of 16808137 is 73180861.

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 a cyclic number.

It is not a de Polignac number, because 16808137 - 2¹⁹ = 16283849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16800137) 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, 42033 + ... + 42430.

It is an arithmetic number, because the mean of its divisors is an integer number (4223200).

Almost surely, 2^16808137 is an apocalyptic number.

It is an amenable number.

16808137 is a deficient number, since it is larger than the sum of its proper divisors (84663).

16808137 is an equidigital number, since it uses as much as digits as its factorization.

16808137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84662.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 16808137 is about 4099.7727985829. The cubic root of 16808137 is about 256.1571758182.

Adding to 16808137 its reverse (73180861), we get a palindrome (89988998).

The spelling of 16808137 in words is "sixteen million, eight hundred eight thousand, one hundred thirty-seven".