123404329 has 2 divisors, whose sum is σ = 123404330. Its totient is φ = 123404328.

The previous prime is 123404327. The next prime is 123404353. The reversal of 123404329 is 923404321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81866304 + 41538025 = 9048^2 + 6445^2 .

It is a cyclic number.

It is not a de Polignac number, because 123404329 - 2¹ = 123404327 is a prime.

Together with 123404327, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 123404297 and 123404306.

It is not a weakly prime, because it can be changed into another prime (123404327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61702164 + 61702165.

It is an arithmetic number, because the mean of its divisors is an integer number (61702165).

Almost surely, 2^123404329 is an apocalyptic number.

It is an amenable number.

123404329 is a deficient number, since it is larger than the sum of its proper divisors (1).

123404329 is an equidigital number, since it uses as much as digits as its factorization.

123404329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 123404329 is about 11108.7501097108. The cubic root of 123404329 is about 497.8633208777.

The spelling of 123404329 in words is "one hundred twenty-three million, four hundred four thousand, three hundred twenty-nine".