705640703123 has 2 divisors, whose sum is σ = 705640703124. Its totient is φ = 705640703122.

The previous prime is 705640703111. The next prime is 705640703147. The reversal of 705640703123 is 321307046507.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 705640703123 - 2²⁰ = 705639654547 is a prime.

It is not a weakly prime, because it can be changed into another prime (705640703023) 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, 352820351561 + 352820351562.

It is an arithmetic number, because the mean of its divisors is an integer number (352820351562).

Almost surely, 2^705640703123 is an apocalyptic number.

705640703123 is a deficient number, since it is larger than the sum of its proper divisors (1).

705640703123 is an equidigital number, since it uses as much as digits as its factorization.

705640703123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 38.

The spelling of 705640703123 in words is "seven hundred five billion, six hundred forty million, seven hundred three thousand, one hundred twenty-three".