123419809 has 2 divisors, whose sum is σ = 123419810. Its totient is φ = 123419808.

The previous prime is 123419789. The next prime is 123419819. The reversal of 123419809 is 908914321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122323600 + 1096209 = 11060^2 + 1047^2 .

It is a cyclic number.

It is not a de Polignac number, because 123419809 - 2⁹ = 123419297 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123419819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61709904 + 61709905.

It is an arithmetic number, because the mean of its divisors is an integer number (61709905).

Almost surely, 2^123419809 is an apocalyptic number.

It is an amenable number.

123419809 is a deficient number, since it is larger than the sum of its proper divisors (1).

123419809 is an equidigital number, since it uses as much as digits as its factorization.

123419809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 123419809 is about 11109.4468359140. The cubic root of 123419809 is about 497.8841375488.

The spelling of 123419809 in words is "one hundred twenty-three million, four hundred nineteen thousand, eight hundred nine".