831431 has 2 divisors, whose sum is σ = 831432. Its totient is φ = 831430.

The previous prime is 831409. The next prime is 831433. The reversal of 831431 is 134138.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 831431 - 2⁶ = 831367 is a prime.

It is a super-2 number, since 2×831431² = 1382555015522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 831433, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (831433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415715 + 415716.

It is an arithmetic number, because the mean of its divisors is an integer number (415716).

2⁸³¹⁴³¹ is an apocalyptic number.

831431 is a deficient number, since it is larger than the sum of its proper divisors (1).

831431 is an equidigital number, since it uses as much as digits as its factorization.

831431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 831431 is about 911.8283829757. The cubic root of 831431 is about 94.0319417628.

Adding to 831431 its reverse (134138), we get a palindrome (965569).

The spelling of 831431 in words is "eight hundred thirty-one thousand, four hundred thirty-one".