16855879 has 4 divisors (see below), whose sum is σ = 17267040. Its totient is φ = 16444720.

The previous prime is 16855877. The next prime is 16855921. The reversal of 16855879 is 97855861.

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 16855879 - 2¹ = 16855877 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 (16855877) 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, 205519 + ... + 205600.

It is an arithmetic number, because the mean of its divisors is an integer number (4316760).

Almost surely, 2^16855879 is an apocalyptic number.

16855879 is a deficient number, since it is larger than the sum of its proper divisors (411161).

16855879 is an equidigital number, since it uses as much as digits as its factorization.

16855879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411160.

The product of its digits is 604800, while the sum is 49.

The square root of 16855879 is about 4105.5911876367. The cubic root of 16855879 is about 256.3994770170.

The spelling of 16855879 in words is "sixteen million, eight hundred fifty-five thousand, eight hundred seventy-nine".