243743887362823 has 2 divisors, whose sum is σ = 243743887362824. Its totient is φ = 243743887362822.

The previous prime is 243743887362809. The next prime is 243743887362827. The reversal of 243743887362823 is 328263788347342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243743887362823 is a prime.

It is a super-2 number, since 2×243743887362823² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243743887362827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121871943681411 + 121871943681412.

It is an arithmetic number, because the mean of its divisors is an integer number (121871943681412).

Almost surely, 2^{243743887362823} is an apocalyptic number.

243743887362823 is a deficient number, since it is larger than the sum of its proper divisors (1).

243743887362823 is an equidigital number, since it uses as much as digits as its factorization.

243743887362823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1560674304, while the sum is 70.

The spelling of 243743887362823 in words is "two hundred forty-three trillion, seven hundred forty-three billion, eight hundred eighty-seven million, three hundred sixty-two thousand, eight hundred twenty-three".