123203929 has 2 divisors, whose sum is σ = 123203930. Its totient is φ = 123203928.

The previous prime is 123203891. The next prime is 123203933. The reversal of 123203929 is 929302321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107163904 + 16040025 = 10352^2 + 4005^2 .

It is a cyclic number.

It is not a de Polignac number, because 123203929 - 2⁹ = 123203417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123203929.

It is not a weakly prime, because it can be changed into another prime (123203329) 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, 61601964 + 61601965.

It is an arithmetic number, because the mean of its divisors is an integer number (61601965).

Almost surely, 2^123203929 is an apocalyptic number.

It is an amenable number.

123203929 is a deficient number, since it is larger than the sum of its proper divisors (1).

123203929 is an equidigital number, since it uses as much as digits as its factorization.

123203929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 123203929 is about 11099.7265281628. The cubic root of 123203929 is about 497.5936764588.

The spelling of 123203929 in words is "one hundred twenty-three million, two hundred three thousand, nine hundred twenty-nine".