831454993 has 2 divisors, whose sum is σ = 831454994. Its totient is φ = 831454992.

The previous prime is 831454973. The next prime is 831455003. The reversal of 831454993 is 399454138.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 730512784 + 100942209 = 27028^2 + 10047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-831454993 is a prime.

It is not a weakly prime, because it can be changed into another prime (831454933) 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, 415727496 + 415727497.

It is an arithmetic number, because the mean of its divisors is an integer number (415727497).

Almost surely, 2^831454993 is an apocalyptic number.

It is an amenable number.

831454993 is a deficient number, since it is larger than the sum of its proper divisors (1).

831454993 is an equidigital number, since it uses as much as digits as its factorization.

831454993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 46.

The square root of 831454993 is about 28834.9612970089. The cubic root of 831454993 is about 940.3284626231.

The spelling of 831454993 in words is "eight hundred thirty-one million, four hundred fifty-four thousand, nine hundred ninety-three".