831161943 has 12 divisors (see below), whose sum is σ = 1271189088. Its totient is φ = 521513280.

The previous prime is 831161941. The next prime is 831161999. The reversal of 831161943 is 349161138.

831161943 is a `hidden beast` number, since 8 + 31 + 1 + 619 + 4 + 3 = 666.

It is not a de Polignac number, because 831161943 - 2¹ = 831161941 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 831161898 and 831161907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831161941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2716063 + ... + 2716368.

It is an arithmetic number, because the mean of its divisors is an integer number (105932424).

Almost surely, 2^831161943 is an apocalyptic number.

831161943 is a deficient number, since it is larger than the sum of its proper divisors (440027145).

831161943 is a wasteful number, since it uses less digits than its factorization.

831161943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5432454 (or 5432451 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 831161943 is about 28829.8793441804. The cubic root of 831161943 is about 940.2179753291.

The spelling of 831161943 in words is "eight hundred thirty-one million, one hundred sixty-one thousand, nine hundred forty-three".