831361 has 2 divisors, whose sum is σ = 831362. Its totient is φ = 831360.

The previous prime is 831329. The next prime is 831367. The reversal of 831361 is 163138.

831361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 712336 + 119025 = 844^2 + 345^2 .

It is a cyclic number.

It is not a de Polignac number, because 831361 - 2⁵ = 831329 is a prime.

It is a super-2 number, since 2×831361² = 1382322224642, which contains 22 as substring.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (831367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415680 + 415681.

It is an arithmetic number, because the mean of its divisors is an integer number (415681).

2⁸³¹³⁶¹ is an apocalyptic number.

It is an amenable number.

831361 is a deficient number, since it is larger than the sum of its proper divisors (1).

831361 is an equidigital number, since it uses as much as digits as its factorization.

831361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 22.

The square root of 831361 is about 911.7899977517. The cubic root of 831361 is about 94.0293027703.

Adding to 831361 its reverse (163138), we get a palindrome (994499).

It can be divided in two parts, 83 and 1361, that added together give a square (1444 = 38²).

The spelling of 831361 in words is "eight hundred thirty-one thousand, three hundred sixty-one".