831329 has 2 divisors, whose sum is σ = 831330. Its totient is φ = 831328.

The previous prime is 831323. The next prime is 831361. The reversal of 831329 is 923138.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 719104 + 112225 = 848^2 + 335^2 .

It is a cyclic number.

It is not a de Polignac number, because 831329 - 2⁸ = 831073 is a prime.

It is a super-2 number, since 2×831329² = 1382215812482, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 831298 and 831307.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 831329.

It is not a weakly prime, because it can be changed into another prime (831323) 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, 415664 + 415665.

It is an arithmetic number, because the mean of its divisors is an integer number (415665).

2⁸³¹³²⁹ is an apocalyptic number.

It is an amenable number.

831329 is a deficient number, since it is larger than the sum of its proper divisors (1).

831329 is an equidigital number, since it uses as much as digits as its factorization.

831329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 831329 is about 911.7724496825. The cubic root of 831329 is about 94.0280963244.

Subtracting 831329 from its reverse (923138), we obtain a square (91809 = 303²).

The spelling of 831329 in words is "eight hundred thirty-one thousand, three hundred twenty-nine".