123499993 has 2 divisors, whose sum is σ = 123499994. Its totient is φ = 123499992.

The previous prime is 123499979. The next prime is 123500011. The reversal of 123499993 is 399994321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114661264 + 8838729 = 10708^2 + 2973^2 .

It is an emirp because it is prime and its reverse (399994321) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123499993 is a prime.

It is not a weakly prime, because it can be changed into another prime (123499193) 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, 61749996 + 61749997.

It is an arithmetic number, because the mean of its divisors is an integer number (61749997).

Almost surely, 2^123499993 is an apocalyptic number.

It is an amenable number.

123499993 is a deficient number, since it is larger than the sum of its proper divisors (1).

123499993 is an equidigital number, since it uses as much as digits as its factorization.

123499993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 472392, while the sum is 49.

The square root of 123499993 is about 11113.0550705015. The cubic root of 123499993 is about 497.9919368275.

The spelling of 123499993 in words is "one hundred twenty-three million, four hundred ninety-nine thousand, nine hundred ninety-three".