999942831831 has 8 divisors (see below), whose sum is σ = 1391224809600. Its totient is φ = 637644704312.

The previous prime is 999942831773. The next prime is 999942831887. The reversal of 999942831831 is 138138249999.

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

It is a cyclic number.

It is not a de Polignac number, because 999942831831 - 2²⁹ = 999405960919 is a prime.

It is a super-2 number, since 2×999942831831² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999942831031) 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, 7245962481 + ... + 7245962618.

It is an arithmetic number, because the mean of its divisors is an integer number (173903101200).

Almost surely, 2^999942831831 is an apocalyptic number.

999942831831 is a deficient number, since it is larger than the sum of its proper divisors (391281977769).

999942831831 is a wasteful number, since it uses less digits than its factorization.

999942831831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14491925125.

The product of its digits is 30233088, while the sum is 66.

The spelling of 999942831831 in words is "nine hundred ninety-nine billion, nine hundred forty-two million, eight hundred thirty-one thousand, eight hundred thirty-one".