123340999 has 2 divisors, whose sum is σ = 123341000. Its totient is φ = 123340998.

The previous prime is 123340991. The next prime is 123341039. The reversal of 123340999 is 999043321.

It is an a-pointer prime, because the next prime (123341039) can be obtained adding 123340999 to its sum of digits (40).

It is a weak prime.

It is an emirp because it is prime and its reverse (999043321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123340999 - 2³ = 123340991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123340991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61670499 + 61670500.

It is an arithmetic number, because the mean of its divisors is an integer number (61670500).

Almost surely, 2^123340999 is an apocalyptic number.

123340999 is a deficient number, since it is larger than the sum of its proper divisors (1).

123340999 is an equidigital number, since it uses as much as digits as its factorization.

123340999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 123340999 is about 11105.8992882162. The cubic root of 123340999 is about 497.7781399674.

The spelling of 123340999 in words is "one hundred twenty-three million, three hundred forty thousand, nine hundred ninety-nine".