123243943 has 2 divisors, whose sum is σ = 123243944. Its totient is φ = 123243942.

The previous prime is 123243893. The next prime is 123243947. The reversal of 123243943 is 349342321.

It is a strong prime.

It is an emirp because it is prime and its reverse (349342321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123243943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123243947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61621971 + 61621972.

It is an arithmetic number, because the mean of its divisors is an integer number (61621972).

Almost surely, 2^123243943 is an apocalyptic number.

123243943 is a deficient number, since it is larger than the sum of its proper divisors (1).

123243943 is an equidigital number, since it uses as much as digits as its factorization.

123243943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 31.

The square root of 123243943 is about 11101.5288586753. The cubic root of 123243943 is about 497.6475398877.

The spelling of 123243943 in words is "one hundred twenty-three million, two hundred forty-three thousand, nine hundred forty-three".