831961 has 4 divisors (see below), whose sum is σ = 895972. Its totient is φ = 767952.

The previous prime is 831917. The next prime is 831967. The reversal of 831961 is 169138.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 384400 + 447561 = 620^2 + 669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-831961 is a prime.

It is a Duffinian number.

831961 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (831967) 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 in 3 ways as a sum of consecutive naturals, for example, 31986 + ... + 32011.

It is an arithmetic number, because the mean of its divisors is an integer number (223993).

2⁸³¹⁹⁶¹ is an apocalyptic number.

It is an amenable number.

831961 is a deficient number, since it is larger than the sum of its proper divisors (64011).

831961 is a wasteful number, since it uses less digits than its factorization.

831961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64010.

The product of its digits is 1296, while the sum is 28.

The square root of 831961 is about 912.1189615396. The cubic root of 831961 is about 94.0519179017.

The spelling of 831961 in words is "eight hundred thirty-one thousand, nine hundred sixty-one".