16858087 has 4 divisors (see below), whose sum is σ = 16870680. Its totient is φ = 16845496.

The previous prime is 16858069. The next prime is 16858091. The reversal of 16858087 is 78085861.

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 16858087 - 2¹⁹ = 16333799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16858487) 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, 4012 + ... + 7057.

It is an arithmetic number, because the mean of its divisors is an integer number (4217670).

Almost surely, 2^16858087 is an apocalyptic number.

16858087 is a deficient number, since it is larger than the sum of its proper divisors (12593).

16858087 is a wasteful number, since it uses less digits than its factorization.

16858087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12592.

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 16858087 is about 4105.8600804216. The cubic root of 16858087 is about 256.4106720295.

The spelling of 16858087 in words is "sixteen million, eight hundred fifty-eight thousand, eighty-seven".