831386969 has 12 divisors (see below), whose sum is σ = 970630884. Its totient is φ = 710033184.

The previous prime is 831386891. The next prime is 831386981. The reversal of 831386969 is 969683138.

It can be written as a sum of positive squares in 2 ways, for example, as 116359369 + 715027600 = 10787^2 + 26740^2 .

It is not a de Polignac number, because 831386969 - 2¹² = 831382873 is a prime.

It is a super-2 number, since 2×831386969² = 1382408584446013922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 831386969.

It is not an unprimeable number, because it can be changed into a prime (831386869) 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 in 11 ways as a sum of consecutive naturals, for example, 17054 + ... + 44199.

It is an arithmetic number, because the mean of its divisors is an integer number (80885907).

Almost surely, 2^831386969 is an apocalyptic number.

It is an amenable number.

831386969 is a deficient number, since it is larger than the sum of its proper divisors (139243915).

831386969 is a wasteful number, since it uses less digits than its factorization.

831386969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61544 (or 61537 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 53.

The square root of 831386969 is about 28833.7817325442. The cubic root of 831386969 is about 940.3028181611.

The spelling of 831386969 in words is "eight hundred thirty-one million, three hundred eighty-six thousand, nine hundred sixty-nine".