857984223 has 4 divisors (see below), whose sum is σ = 1143978968. Its totient is φ = 571989480.

The previous prime is 857984221. The next prime is 857984251. The reversal of 857984223 is 322489758.

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

It is not a de Polignac number, because 857984223 - 2¹ = 857984221 is a prime.

It is a super-2 number, since 2×857984223² = 1472273853833827458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857984221) 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, 142997368 + ... + 142997373.

It is an arithmetic number, because the mean of its divisors is an integer number (285994742).

Almost surely, 2^857984223 is an apocalyptic number.

857984223 is a deficient number, since it is larger than the sum of its proper divisors (285994745).

857984223 is a wasteful number, since it uses less digits than its factorization.

857984223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285994744.

The product of its digits is 967680, while the sum is 48.

The square root of 857984223 is about 29291.3677215660. The cubic root of 857984223 is about 950.2249598371.

The spelling of 857984223 in words is "eight hundred fifty-seven million, nine hundred eighty-four thousand, two hundred twenty-three".