16987667 has 4 divisors (see below), whose sum is σ = 17075880. Its totient is φ = 16899456.

The previous prime is 16987661. The next prime is 16987669. The reversal of 16987667 is 76678961.

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

It is a cyclic number.

It is not a de Polignac number, because 16987667 - 2¹⁰ = 16986643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16987661) 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, 43817 + ... + 44202.

It is an arithmetic number, because the mean of its divisors is an integer number (4268970).

Almost surely, 2^16987667 is an apocalyptic number.

16987667 is a deficient number, since it is larger than the sum of its proper divisors (88213).

16987667 is an equidigital number, since it uses as much as digits as its factorization.

16987667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88212.

The product of its digits is 762048, while the sum is 50.

The square root of 16987667 is about 4121.6097583347. The cubic root of 16987667 is about 257.0659643843.

The spelling of 16987667 in words is "sixteen million, nine hundred eighty-seven thousand, six hundred sixty-seven".