831255961 has 2 divisors, whose sum is σ = 831255962. Its totient is φ = 831255960.

The previous prime is 831255883. The next prime is 831255977. The reversal of 831255961 is 169552138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 746983561 + 84272400 = 27331^2 + 9180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-831255961 is a prime.

It is a weakly prime.

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, 415627980 + 415627981.

It is an arithmetic number, because the mean of its divisors is an integer number (415627981).

Almost surely, 2^831255961 is an apocalyptic number.

It is an amenable number.

831255961 is a deficient number, since it is larger than the sum of its proper divisors (1).

831255961 is an equidigital number, since it uses as much as digits as its factorization.

831255961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 40.

The square root of 831255961 is about 28831.5098633422. The cubic root of 831255961 is about 940.2534253323.

The spelling of 831255961 in words is "eight hundred thirty-one million, two hundred fifty-five thousand, nine hundred sixty-one".