831378593 has 2 divisors, whose sum is σ = 831378594. Its totient is φ = 831378592.

The previous prime is 831378517. The next prime is 831378623. The reversal of 831378593 is 395873138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 783048289 + 48330304 = 27983^2 + 6952^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-831378593 is a prime.

It is not a weakly prime, because it can be changed into another prime (831378503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415689296 + 415689297.

It is an arithmetic number, because the mean of its divisors is an integer number (415689297).

Almost surely, 2^831378593 is an apocalyptic number.

It is an amenable number.

831378593 is a deficient number, since it is larger than the sum of its proper divisors (1).

831378593 is an equidigital number, since it uses as much as digits as its factorization.

831378593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 831378593 is about 28833.6364858822. The cubic root of 831378593 is about 940.2996603846.

The spelling of 831378593 in words is "eight hundred thirty-one million, three hundred seventy-eight thousand, five hundred ninety-three".