122209509 has 16 divisors (see below), whose sum is σ = 168854400. Its totient is φ = 78528576.

The previous prime is 122209499. The next prime is 122209513. The reversal of 122209509 is 905902221.

It is not a de Polignac number, because 122209509 - 2⁸ = 122209253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122209559) 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 in 15 ways as a sum of consecutive naturals, for example, 84807 + ... + 86235.

It is an arithmetic number, because the mean of its divisors is an integer number (10553400).

Almost surely, 2^122209509 is an apocalyptic number.

It is an amenable number.

122209509 is a deficient number, since it is larger than the sum of its proper divisors (46644891).

122209509 is a wasteful number, since it uses less digits than its factorization.

122209509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 122209509 is about 11054.8409757897. The cubic root of 122209509 is about 496.2513102221.

The spelling of 122209509 in words is "one hundred twenty-two million, two hundred nine thousand, five hundred nine".