123705047 has 2 divisors, whose sum is σ = 123705048. Its totient is φ = 123705046.

The previous prime is 123705041. The next prime is 123705079. The reversal of 123705047 is 740507321.

It is a weak prime.

It is an emirp because it is prime and its reverse (740507321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123705047 - 2¹⁶ = 123639511 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123705041) 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, 61852523 + 61852524.

It is an arithmetic number, because the mean of its divisors is an integer number (61852524).

Almost surely, 2^123705047 is an apocalyptic number.

123705047 is a deficient number, since it is larger than the sum of its proper divisors (1).

123705047 is an equidigital number, since it uses as much as digits as its factorization.

123705047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 123705047 is about 11122.2770600269. The cubic root of 123705047 is about 498.2673991232.

The spelling of 123705047 in words is "one hundred twenty-three million, seven hundred five thousand, forty-seven".