123205301993 has 2 divisors, whose sum is σ = 123205301994. Its totient is φ = 123205301992.

The previous prime is 123205301987. The next prime is 123205302013. The reversal of 123205301993 is 399103502321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122995399849 + 209902144 = 350707^2 + 14488^2 .

It is a cyclic number.

It is not a de Polignac number, because 123205301993 - 2⁴ = 123205301977 is a prime.

It is not a weakly prime, because it can be changed into another prime (123205301903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61602650996 + 61602650997.

It is an arithmetic number, because the mean of its divisors is an integer number (61602650997).

Almost surely, 2^123205301993 is an apocalyptic number.

It is an amenable number.

123205301993 is a deficient number, since it is larger than the sum of its proper divisors (1).

123205301993 is an equidigital number, since it uses as much as digits as its factorization.

123205301993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 38.

The spelling of 123205301993 in words is "one hundred twenty-three billion, two hundred five million, three hundred one thousand, nine hundred ninety-three".