123423366749699 has 2 divisors, whose sum is σ = 123423366749700. Its totient is φ = 123423366749698.

The previous prime is 123423366749681. The next prime is 123423366749867. The reversal of 123423366749699 is 996947663324321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123423366749699 is a prime.

It is not a weakly prime, because it can be changed into another prime (123423366749659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61711683374849 + 61711683374850.

It is an arithmetic number, because the mean of its divisors is an integer number (61711683374850).

Almost surely, 2^{123423366749699} is an apocalyptic number.

123423366749699 is a deficient number, since it is larger than the sum of its proper divisors (1).

123423366749699 is an equidigital number, since it uses as much as digits as its factorization.

123423366749699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1904684544, while the sum is 74.

The spelling of 123423366749699 in words is "one hundred twenty-three trillion, four hundred twenty-three billion, three hundred sixty-six million, seven hundred forty-nine thousand, six hundred ninety-nine".