16987867 has 4 divisors (see below), whose sum is σ = 18294640. Its totient is φ = 15681096.

The previous prime is 16987853. The next prime is 16987891. The reversal of 16987867 is 76878961.

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 16987867 - 2⁷ = 16987739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16987807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653367 + ... + 653392.

It is an arithmetic number, because the mean of its divisors is an integer number (4573660).

Almost surely, 2^16987867 is an apocalyptic number.

16987867 is a deficient number, since it is larger than the sum of its proper divisors (1306773).

16987867 is a wasteful number, since it uses less digits than its factorization.

16987867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306772.

The product of its digits is 1016064, while the sum is 52.

The square root of 16987867 is about 4121.6340206282. The cubic root of 16987867 is about 257.0669732141.

The spelling of 16987867 in words is "sixteen million, nine hundred eighty-seven thousand, eight hundred sixty-seven".