831431084493 has 4 divisors (see below), whose sum is σ = 1108574779328. Its totient is φ = 554287389660.

The previous prime is 831431084483. The next prime is 831431084537. The reversal of 831431084493 is 394480134138.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 831431084493 - 2⁹ = 831431083981 is a prime.

It is a super-2 number, since 2×831431084493² (a number of 25 digits) 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 (831431084483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138571847413 + ... + 138571847418.

It is an arithmetic number, because the mean of its divisors is an integer number (277143694832).

Almost surely, 2^831431084493 is an apocalyptic number.

It is an amenable number.

831431084493 is a deficient number, since it is larger than the sum of its proper divisors (277143694835).

831431084493 is a wasteful number, since it uses less digits than its factorization.

831431084493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277143694834.

The product of its (nonzero) digits is 995328, while the sum is 48.

The spelling of 831431084493 in words is "eight hundred thirty-one billion, four hundred thirty-one million, eighty-four thousand, four hundred ninety-three".