12843497693 has 4 divisors (see below), whose sum is σ = 13831459068. Its totient is φ = 11855536320.

The previous prime is 12843497657. The next prime is 12843497713. The reversal of 12843497693 is 39679434821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39679434821 = 13 ⋅3052264217.

It can be written as a sum of positive squares in 2 ways, for example, as 4541007769 + 8302489924 = 67387^2 + 91118^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12843497693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12843497633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493980668 + ... + 493980693.

It is an arithmetic number, because the mean of its divisors is an integer number (3457864767).

Almost surely, 2^12843497693 is an apocalyptic number.

12843497693 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12843497693 is a deficient number, since it is larger than the sum of its proper divisors (987961375).

12843497693 is an equidigital number, since it uses as much as digits as its factorization.

12843497693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987961374.

The product of its digits is 7838208, while the sum is 56.

The spelling of 12843497693 in words is "twelve billion, eight hundred forty-three million, four hundred ninety-seven thousand, six hundred ninety-three".