16816937 has 4 divisors (see below), whose sum is σ = 17047380. Its totient is φ = 16586496.

The previous prime is 16816931. The next prime is 16816939. The reversal of 16816937 is 73961861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10686361 + 6130576 = 3269^2 + 2476^2 .

It is a cyclic number.

It is not a de Polignac number, because 16816937 - 2²² = 12622633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16816894 and 16816903.

It is not an unprimeable number, because it can be changed into a prime (16816931) 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, 115112 + ... + 115257.

It is an arithmetic number, because the mean of its divisors is an integer number (4261845).

Almost surely, 2^16816937 is an apocalyptic number.

It is an amenable number.

16816937 is a deficient number, since it is larger than the sum of its proper divisors (230443).

16816937 is an equidigital number, since it uses as much as digits as its factorization.

16816937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230442.

The product of its digits is 54432, while the sum is 41.

The square root of 16816937 is about 4100.8458883504. The cubic root of 16816937 is about 256.2018722226.

The spelling of 16816937 in words is "sixteen million, eight hundred sixteen thousand, nine hundred thirty-seven".