831321023 has 4 divisors (see below), whose sum is σ = 895268808. Its totient is φ = 767373240.

The previous prime is 831321019. The next prime is 831321103. The reversal of 831321023 is 320123138.

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

It is a cyclic number.

It is not a de Polignac number, because 831321023 - 2² = 831321019 is a prime.

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 831321023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831321013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31973873 + ... + 31973898.

It is an arithmetic number, because the mean of its divisors is an integer number (223817202).

Almost surely, 2^831321023 is an apocalyptic number.

831321023 is a deficient number, since it is larger than the sum of its proper divisors (63947785).

831321023 is a wasteful number, since it uses less digits than its factorization.

831321023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63947784.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 831321023 is about 28832.6381553960. The cubic root of 831321023 is about 940.2779557519.

The spelling of 831321023 in words is "eight hundred thirty-one million, three hundred twenty-one thousand, twenty-three".