831493861 has 16 divisors (see below), whose sum is σ = 951533568. Its totient is φ = 719210800.

The previous prime is 831493841. The next prime is 831493937. The reversal of 831493861 is 168394138.

It is not a de Polignac number, because 831493861 - 2¹⁷ = 831362789 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 (831493841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39720 + ... + 56926.

It is an arithmetic number, because the mean of its divisors is an integer number (59470848).

Almost surely, 2^831493861 is an apocalyptic number.

It is an amenable number.

831493861 is a deficient number, since it is larger than the sum of its proper divisors (120039707).

831493861 is a wasteful number, since it uses less digits than its factorization.

831493861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17432.

The product of its digits is 124416, while the sum is 43.

The square root of 831493861 is about 28835.6352626399. The cubic root of 831493861 is about 940.3431148963.

The spelling of 831493861 in words is "eight hundred thirty-one million, four hundred ninety-three thousand, eight hundred sixty-one".