122339809 has 2 divisors, whose sum is σ = 122339810. Its totient is φ = 122339808.

The previous prime is 122339761. The next prime is 122339849. The reversal of 122339809 is 908933221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119968209 + 2371600 = 10953^2 + 1540^2 .

It is a cyclic number.

It is not a de Polignac number, because 122339809 - 2⁷ = 122339681 is a prime.

It is not a weakly prime, because it can be changed into another prime (122339849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61169904 + 61169905.

It is an arithmetic number, because the mean of its divisors is an integer number (61169905).

Almost surely, 2^122339809 is an apocalyptic number.

It is an amenable number.

122339809 is a deficient number, since it is larger than the sum of its proper divisors (1).

122339809 is an equidigital number, since it uses as much as digits as its factorization.

122339809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 122339809 is about 11060.7327514953. The cubic root of 122339809 is about 496.4276155933.

The spelling of 122339809 in words is "one hundred twenty-two million, three hundred thirty-nine thousand, eight hundred nine".