857841971 has 16 divisors (see below), whose sum is σ = 1043904000. Its totient is φ = 703317384.

The previous prime is 857841931. The next prime is 857841977. The reversal of 857841971 is 179148758.

It is not a de Polignac number, because 857841971 - 2¹⁰ = 857840947 is a prime.

It is a super-4 number, since 4×857841971⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857841977) 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 15 ways as a sum of consecutive naturals, for example, 46481 + ... + 62258.

It is an arithmetic number, because the mean of its divisors is an integer number (65244000).

Almost surely, 2^857841971 is an apocalyptic number.

857841971 is a deficient number, since it is larger than the sum of its proper divisors (186062029).

857841971 is a wasteful number, since it uses less digits than its factorization.

857841971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108783 (or 108769 counting only the distinct ones).

The product of its digits is 564480, while the sum is 50.

The square root of 857841971 is about 29288.9393969806. The cubic root of 857841971 is about 950.1724418271.

The spelling of 857841971 in words is "eight hundred fifty-seven million, eight hundred forty-one thousand, nine hundred seventy-one".