123103993 has 2 divisors, whose sum is σ = 123103994. Its totient is φ = 123103992.

The previous prime is 123103973. The next prime is 123104053. The reversal of 123103993 is 399301321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96766569 + 26337424 = 9837^2 + 5132^2 .

It is a cyclic number.

It is not a de Polignac number, because 123103993 - 2¹³ = 123095801 is a prime.

It is not a weakly prime, because it can be changed into another prime (123103933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61551996 + 61551997.

It is an arithmetic number, because the mean of its divisors is an integer number (61551997).

Almost surely, 2^123103993 is an apocalyptic number.

It is an amenable number.

123103993 is a deficient number, since it is larger than the sum of its proper divisors (1).

123103993 is an equidigital number, since it uses as much as digits as its factorization.

123103993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 123103993 is about 11095.2238823739. The cubic root of 123103993 is about 497.4591001957.

The spelling of 123103993 in words is "one hundred twenty-three million, one hundred three thousand, nine hundred ninety-three".