243423179647 has 2 divisors, whose sum is σ = 243423179648. Its totient is φ = 243423179646.

The previous prime is 243423179633. The next prime is 243423179677. The reversal of 243423179647 is 746971324342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243423179647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243423179594 and 243423179603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243423179677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121711589823 + 121711589824.

It is an arithmetic number, because the mean of its divisors is an integer number (121711589824).

Almost surely, 2^243423179647 is an apocalyptic number.

243423179647 is a deficient number, since it is larger than the sum of its proper divisors (1).

243423179647 is an equidigital number, since it uses as much as digits as its factorization.

243423179647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 52.

The spelling of 243423179647 in words is "two hundred forty-three billion, four hundred twenty-three million, one hundred seventy-nine thousand, six hundred forty-seven".