831980421 has 12 divisors (see below), whose sum is σ = 1204925280. Its totient is φ = 553187880.

The previous prime is 831980411. The next prime is 831980423. The reversal of 831980421 is 124089138.

It is not a de Polignac number, because 831980421 - 2⁷ = 831980293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831980423) 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 11 ways as a sum of consecutive naturals, for example, 118545 + ... + 125366.

It is an arithmetic number, because the mean of its divisors is an integer number (100410440).

Almost surely, 2^831980421 is an apocalyptic number.

It is an amenable number.

831980421 is a deficient number, since it is larger than the sum of its proper divisors (372944859).

831980421 is a wasteful number, since it uses less digits than its factorization.

831980421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244296 (or 244293 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 831980421 is about 28844.0708118670. The cubic root of 831980421 is about 940.5264973410.

The spelling of 831980421 in words is "eight hundred thirty-one million, nine hundred eighty thousand, four hundred twenty-one".