122345309 has 2 divisors, whose sum is σ = 122345310. Its totient is φ = 122345308.

The previous prime is 122345281. The next prime is 122345317. The reversal of 122345309 is 903543221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112296409 + 10048900 = 10597^2 + 3170^2 .

It is a cyclic number.

It is not a de Polignac number, because 122345309 - 2⁸ = 122345053 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122345329) 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, 61172654 + 61172655.

It is an arithmetic number, because the mean of its divisors is an integer number (61172655).

Almost surely, 2^122345309 is an apocalyptic number.

It is an amenable number.

122345309 is a deficient number, since it is larger than the sum of its proper divisors (1).

122345309 is an equidigital number, since it uses as much as digits as its factorization.

122345309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 122345309 is about 11060.9813759901. The cubic root of 122345309 is about 496.4350547390.

The spelling of 122345309 in words is "one hundred twenty-two million, three hundred forty-five thousand, three hundred nine".