831127813 has 2 divisors, whose sum is σ = 831127814. Its totient is φ = 831127812.

The previous prime is 831127799. The next prime is 831127823. The reversal of 831127813 is 318721138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525647329 + 305480484 = 22927^2 + 17478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-831127813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (831127823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415563906 + 415563907.

It is an arithmetic number, because the mean of its divisors is an integer number (415563907).

Almost surely, 2^831127813 is an apocalyptic number.

It is an amenable number.

831127813 is a deficient number, since it is larger than the sum of its proper divisors (1).

831127813 is an equidigital number, since it uses as much as digits as its factorization.

831127813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 34.

The square root of 831127813 is about 28829.2874174857. The cubic root of 831127813 is about 940.2051057638.

The spelling of 831127813 in words is "eight hundred thirty-one million, one hundred twenty-seven thousand, eight hundred thirteen".