831087137 has 2 divisors, whose sum is σ = 831087138. Its totient is φ = 831087136.

The previous prime is 831087107. The next prime is 831087161. The reversal of 831087137 is 731780138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 477684736 + 353402401 = 21856^2 + 18799^2 .

It is a cyclic number.

It is not a de Polignac number, because 831087137 - 2¹² = 831083041 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 831087137.

It is not a weakly prime, because it can be changed into another prime (831087107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415543568 + 415543569.

It is an arithmetic number, because the mean of its divisors is an integer number (415543569).

Almost surely, 2^831087137 is an apocalyptic number.

It is an amenable number.

831087137 is a deficient number, since it is larger than the sum of its proper divisors (1).

831087137 is an equidigital number, since it uses as much as digits as its factorization.

831087137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 831087137 is about 28828.5819457010. The cubic root of 831087137 is about 940.1897674062.

The spelling of 831087137 in words is "eight hundred thirty-one million, eighty-seven thousand, one hundred thirty-seven".