831319847 has 2 divisors, whose sum is σ = 831319848. Its totient is φ = 831319846.

The previous prime is 831319807. The next prime is 831319849. The reversal of 831319847 is 748913138.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 831319847 - 2¹⁶ = 831254311 is a prime.

It is a super-2 number, since 2×831319847² = 1382185376032206818, which contains 22 as substring.

Together with 831319849, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 831319798 and 831319807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (831319849) 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 as a sum of consecutive naturals, namely, 415659923 + 415659924.

It is an arithmetic number, because the mean of its divisors is an integer number (415659924).

Almost surely, 2^831319847 is an apocalyptic number.

831319847 is a deficient number, since it is larger than the sum of its proper divisors (1).

831319847 is an equidigital number, since it uses as much as digits as its factorization.

831319847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 831319847 is about 28832.6177618336. The cubic root of 831319847 is about 940.2775123742.

The spelling of 831319847 in words is "eight hundred thirty-one million, three hundred nineteen thousand, eight hundred forty-seven".