123166543 has 2 divisors, whose sum is σ = 123166544. Its totient is φ = 123166542.

The previous prime is 123166517. The next prime is 123166553. The reversal of 123166543 is 345661321.

It is a strong prime.

It is an emirp because it is prime and its reverse (345661321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123166543 - 2⁹ = 123166031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123166553) 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 as a sum of consecutive naturals, namely, 61583271 + 61583272.

It is an arithmetic number, because the mean of its divisors is an integer number (61583272).

Almost surely, 2^123166543 is an apocalyptic number.

123166543 is a deficient number, since it is larger than the sum of its proper divisors (1).

123166543 is an equidigital number, since it uses as much as digits as its factorization.

123166543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 123166543 is about 11098.0423048392. The cubic root of 123166543 is about 497.5433400792.

The spelling of 123166543 in words is "one hundred twenty-three million, one hundred sixty-six thousand, five hundred forty-three".