831387427 has 16 divisors (see below), whose sum is σ = 948747520. Its totient is φ = 722196000.

The previous prime is 831387391. The next prime is 831387433. The reversal of 831387427 is 724783138.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-831387427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (831382427) 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 15 ways as a sum of consecutive naturals, for example, 26152 + ... + 48442.

It is an arithmetic number, because the mean of its divisors is an integer number (59296720).

Almost surely, 2^831387427 is an apocalyptic number.

831387427 is a deficient number, since it is larger than the sum of its proper divisors (117360093).

831387427 is a wasteful number, since it uses less digits than its factorization.

831387427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22474.

The product of its digits is 225792, while the sum is 43.

The square root of 831387427 is about 28833.7896746161. The cubic root of 831387427 is about 940.3029908279.

The spelling of 831387427 in words is "eight hundred thirty-one million, three hundred eighty-seven thousand, four hundred twenty-seven".