831745491 has 8 divisors (see below), whose sum is σ = 1147235280. Its totient is φ = 535376352.

The previous prime is 831745487. The next prime is 831745493. The reversal of 831745491 is 194547138.

It is a happy number.

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

It is not a de Polignac number, because 831745491 - 2² = 831745487 is a prime.

It is a super-3 number, since 3×831745491³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (831745493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4780060 + ... + 4780233.

It is an arithmetic number, because the mean of its divisors is an integer number (143404410).

Almost surely, 2^831745491 is an apocalyptic number.

831745491 is a deficient number, since it is larger than the sum of its proper divisors (315489789).

831745491 is a wasteful number, since it uses less digits than its factorization.

831745491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9560325.

The product of its digits is 120960, while the sum is 42.

The square root of 831745491 is about 28839.9981102635. The cubic root of 831745491 is about 940.4379621282.

The spelling of 831745491 in words is "eight hundred thirty-one million, seven hundred forty-five thousand, four hundred ninety-one".