120323209 has 2 divisors, whose sum is σ = 120323210. Its totient is φ = 120323208.

The previous prime is 120323207. The next prime is 120323221. The reversal of 120323209 is 902323021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117072400 + 3250809 = 10820^2 + 1803^2 .

It is a cyclic number.

It is not a de Polignac number, because 120323209 - 2¹ = 120323207 is a prime.

Together with 120323207, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 120323209.

It is not a weakly prime, because it can be changed into another prime (120323201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60161604 + 60161605.

It is an arithmetic number, because the mean of its divisors is an integer number (60161605).

Almost surely, 2^120323209 is an apocalyptic number.

It is an amenable number.

120323209 is a deficient number, since it is larger than the sum of its proper divisors (1).

120323209 is an equidigital number, since it uses as much as digits as its factorization.

120323209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 120323209 is about 10969.1936349032. The cubic root of 120323209 is about 493.6848522922.

The spelling of 120323209 in words is "one hundred twenty million, three hundred twenty-three thousand, two hundred nine".