122209309 has 4 divisors (see below), whose sum is σ = 122747904. Its totient is φ = 121670716.

The previous prime is 122209303. The next prime is 122209319. The reversal of 122209309 is 903902221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122209309 - 2⁹ = 122208797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122209303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268957 + ... + 269410.

It is an arithmetic number, because the mean of its divisors is an integer number (30686976).

Almost surely, 2^122209309 is an apocalyptic number.

It is an amenable number.

122209309 is a deficient number, since it is larger than the sum of its proper divisors (538595).

122209309 is an equidigital number, since it uses as much as digits as its factorization.

122209309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538594.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 122209309 is about 11054.8319299752. The cubic root of 122209309 is about 496.2510395112.

The spelling of 122209309 in words is "one hundred twenty-two million, two hundred nine thousand, three hundred nine".