123706543 has 2 divisors, whose sum is σ = 123706544. Its totient is φ = 123706542.

The previous prime is 123706537. The next prime is 123706567. The reversal of 123706543 is 345607321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123706543 - 2²¹ = 121609391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123706573) 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, 61853271 + 61853272.

It is an arithmetic number, because the mean of its divisors is an integer number (61853272).

Almost surely, 2^123706543 is an apocalyptic number.

123706543 is a deficient number, since it is larger than the sum of its proper divisors (1).

123706543 is an equidigital number, since it uses as much as digits as its factorization.

123706543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 123706543 is about 11122.3443122392. The cubic root of 123706543 is about 498.2694076778.

The spelling of 123706543 in words is "one hundred twenty-three million, seven hundred six thousand, five hundred forty-three".