831317087 has 2 divisors, whose sum is σ = 831317088. Its totient is φ = 831317086.

The previous prime is 831317033. The next prime is 831317093. The reversal of 831317087 is 780713138.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 831317087 - 2⁸ = 831316831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 831317087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (831317027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415658543 + 415658544.

It is an arithmetic number, because the mean of its divisors is an integer number (415658544).

Almost surely, 2^831317087 is an apocalyptic number.

831317087 is a deficient number, since it is larger than the sum of its proper divisors (1).

831317087 is an equidigital number, since it uses as much as digits as its factorization.

831317087 is an evil number, because the sum of its binary digits is even.

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

The square root of 831317087 is about 28832.5698993343. The cubic root of 831317087 is about 940.2764717925.

The spelling of 831317087 in words is "eight hundred thirty-one million, three hundred seventeen thousand, eighty-seven".