123320999 has 2 divisors, whose sum is σ = 123321000. Its totient is φ = 123320998.

The previous prime is 123320987. The next prime is 123321041. The reversal of 123320999 is 999023321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123320999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123320969) 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, 61660499 + 61660500.

It is an arithmetic number, because the mean of its divisors is an integer number (61660500).

Almost surely, 2^123320999 is an apocalyptic number.

123320999 is a deficient number, since it is larger than the sum of its proper divisors (1).

123320999 is an equidigital number, since it uses as much as digits as its factorization.

123320999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 123320999 is about 11104.9988293561. The cubic root of 123320999 is about 497.7512332588.

The spelling of 123320999 in words is "one hundred twenty-three million, three hundred twenty thousand, nine hundred ninety-nine".