16687001 has 4 divisors (see below), whose sum is σ = 16760100. Its totient is φ = 16613904.

The previous prime is 16686961. The next prime is 16687003. The reversal of 16687001 is 10078661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10078661 = 41 ⋅245821.

It can be written as a sum of positive squares in 2 ways, for example, as 14440000 + 2247001 = 3800^2 + 1499^2 .

It is a cyclic number.

It is not a de Polignac number, because 16687001 - 2¹⁴ = 16670617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16687003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36206 + ... + 36663.

It is an arithmetic number, because the mean of its divisors is an integer number (4190025).

Almost surely, 2^16687001 is an apocalyptic number.

It is an amenable number.

16687001 is a deficient number, since it is larger than the sum of its proper divisors (73099).

16687001 is an equidigital number, since it uses as much as digits as its factorization.

16687001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73098.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 16687001 is about 4084.9725825273. The cubic root of 16687001 is about 255.5403178550.

The spelling of 16687001 in words is "sixteen million, six hundred eighty-seven thousand, one".