123104129 has 2 divisors, whose sum is σ = 123104130. Its totient is φ = 123104128.

The previous prime is 123104117. The next prime is 123104147. The reversal of 123104129 is 921401321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120121600 + 2982529 = 10960^2 + 1727^2 .

It is a cyclic number.

It is not a de Polignac number, because 123104129 - 2⁸ = 123103873 is a prime.

It is not a weakly prime, because it can be changed into another prime (123104329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61552064 + 61552065.

It is an arithmetic number, because the mean of its divisors is an integer number (61552065).

Almost surely, 2^123104129 is an apocalyptic number.

It is an amenable number.

123104129 is a deficient number, since it is larger than the sum of its proper divisors (1).

123104129 is an equidigital number, since it uses as much as digits as its factorization.

123104129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 123104129 is about 11095.2300111354. The cubic root of 123104129 is about 497.4592833861.

The spelling of 123104129 in words is "one hundred twenty-three million, one hundred four thousand, one hundred twenty-nine".