831057971 has 4 divisors (see below), whose sum is σ = 879943752. Its totient is φ = 782172192.

The previous prime is 831057949. The next prime is 831057973. The reversal of 831057971 is 179750138.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179750138 = 2 ⋅89875069.

It is a cyclic number.

It is not a de Polignac number, because 831057971 - 2⁶ = 831057907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (831057973) 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 in 3 ways as a sum of consecutive naturals, for example, 24442865 + ... + 24442898.

It is an arithmetic number, because the mean of its divisors is an integer number (219985938).

Almost surely, 2^831057971 is an apocalyptic number.

831057971 is a deficient number, since it is larger than the sum of its proper divisors (48885781).

831057971 is a wasteful number, since it uses less digits than its factorization.

831057971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48885780.

The product of its (nonzero) digits is 52920, while the sum is 41.

The square root of 831057971 is about 28828.0760891184. The cubic root of 831057971 is about 940.1787690025.

The spelling of 831057971 in words is "eight hundred thirty-one million, fifty-seven thousand, nine hundred seventy-one".