843978395431 has 8 divisors (see below), whose sum is σ = 896548756400. Its totient is φ = 792223079040.

The previous prime is 843978395413. The next prime is 843978395441. The reversal of 843978395431 is 134593879348.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-843978395431 is a prime.

It is a super-2 number, since 2×843978395431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (843978395441) 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, 203759010 + ... + 203763151.

It is an arithmetic number, because the mean of its divisors is an integer number (112068594550).

Almost surely, 2^843978395431 is an apocalyptic number.

843978395431 is a deficient number, since it is larger than the sum of its proper divisors (52570360969).

843978395431 is a wasteful number, since it uses less digits than its factorization.

843978395431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407522289.

The product of its digits is 78382080, while the sum is 64.

The spelling of 843978395431 in words is "eight hundred forty-three billion, nine hundred seventy-eight million, three hundred ninety-five thousand, four hundred thirty-one".