855884999 has 8 divisors (see below), whose sum is σ = 879586608. Its totient is φ = 832213440.

The previous prime is 855884971. The next prime is 855885007. The reversal of 855884999 is 999488558.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855884999 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 (855884959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58019 + ... + 71259.

It is an arithmetic number, because the mean of its divisors is an integer number (109948326).

Almost surely, 2^855884999 is an apocalyptic number.

855884999 is a deficient number, since it is larger than the sum of its proper divisors (23701609).

855884999 is a wasteful number, since it uses less digits than its factorization.

855884999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15025.

The product of its digits is 37324800, while the sum is 65.

The square root of 855884999 is about 29255.5122840124. The cubic root of 855884999 is about 949.4493573504.

The spelling of 855884999 in words is "eight hundred fifty-five million, eight hundred eighty-four thousand, nine hundred ninety-nine".