831774421 has 8 divisors (see below), whose sum is σ = 868140504. Its totient is φ = 796174080.

The previous prime is 831774409. The next prime is 831774439. The reversal of 831774421 is 124477138.

It can be written as a sum of positive squares in 4 ways, for example, as 7452900 + 824321521 = 2730^2 + 28711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 831774421 - 2¹⁵ = 831741653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (831774481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189216 + ... + 193561.

It is an arithmetic number, because the mean of its divisors is an integer number (108517563).

Almost surely, 2^831774421 is an apocalyptic number.

It is an amenable number.

831774421 is a deficient number, since it is larger than the sum of its proper divisors (36366083).

831774421 is a wasteful number, since it uses less digits than its factorization.

831774421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382871.

The product of its digits is 37632, while the sum is 37.

The square root of 831774421 is about 28840.4996662679. The cubic root of 831774421 is about 940.4488655256.

The spelling of 831774421 in words is "eight hundred thirty-one million, seven hundred seventy-four thousand, four hundred twenty-one".