123405343 has 2 divisors, whose sum is σ = 123405344. Its totient is φ = 123405342.

The previous prime is 123405341. The next prime is 123405349. The reversal of 123405343 is 343504321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123405343 - 2¹ = 123405341 is a prime.

Together with 123405341, it forms a pair of twin primes.

It is equal to p_7024471 and since 123405343 and 7024471 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123405341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61702671 + 61702672.

It is an arithmetic number, because the mean of its divisors is an integer number (61702672).

Almost surely, 2^123405343 is an apocalyptic number.

123405343 is a deficient number, since it is larger than the sum of its proper divisors (1).

123405343 is an equidigital number, since it uses as much as digits as its factorization.

123405343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 123405343 is about 11108.7957493150. The cubic root of 123405343 is about 497.8646845036.

Adding to 123405343 its reverse (343504321), we get a palindrome (466909664).

The spelling of 123405343 in words is "one hundred twenty-three million, four hundred five thousand, three hundred forty-three".