123945580243 has 2 divisors, whose sum is σ = 123945580244. Its totient is φ = 123945580242.

The previous prime is 123945580223. The next prime is 123945580289. The reversal of 123945580243 is 342085549321.

It is an a-pointer prime, because the next prime (123945580289) can be obtained adding 123945580243 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123945580243 - 2³³ = 115355645651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123945580193 and 123945580202.

It is not a weakly prime, because it can be changed into another prime (123945580223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61972790121 + 61972790122.

It is an arithmetic number, because the mean of its divisors is an integer number (61972790122).

Almost surely, 2^123945580243 is an apocalyptic number.

123945580243 is a deficient number, since it is larger than the sum of its proper divisors (1).

123945580243 is an equidigital number, since it uses as much as digits as its factorization.

123945580243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 123945580243 in words is "one hundred twenty-three billion, nine hundred forty-five million, five hundred eighty thousand, two hundred forty-three".