831133241387 has 4 divisors (see below), whose sum is σ = 831135103656. Its totient is φ = 831131379120.

The previous prime is 831133241233. The next prime is 831133241417. The reversal of 831133241387 is 783142331138.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 831133241387 - 2¹⁰ = 831133240363 is a prime.

It is a super-2 number, since 2×831133241387² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (831133243387) 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 3 ways as a sum of consecutive naturals, for example, 181448 + ... + 1301994.

It is an arithmetic number, because the mean of its divisors is an integer number (207783775914).

Almost surely, 2^831133241387 is an apocalyptic number.

831133241387 is a deficient number, since it is larger than the sum of its proper divisors (1862269).

831133241387 is a wasteful number, since it uses less digits than its factorization.

831133241387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862268.

The product of its digits is 290304, while the sum is 44.

The spelling of 831133241387 in words is "eight hundred thirty-one billion, one hundred thirty-three million, two hundred forty-one thousand, three hundred eighty-seven".