1220332909 has 2 divisors, whose sum is σ = 1220332910. Its totient is φ = 1220332908.

The previous prime is 1220332903. The next prime is 1220332933. The reversal of 1220332909 is 9092330221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 612562500 + 607770409 = 24750^2 + 24653^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220332909 - 2¹⁵ = 1220300141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220332903) 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, 610166454 + 610166455.

It is an arithmetic number, because the mean of its divisors is an integer number (610166455).

Almost surely, 2^1220332909 is an apocalyptic number.

It is an amenable number.

1220332909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220332909 is an equidigital number, since it uses as much as digits as its factorization.

1220332909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 1220332909 is about 34933.2636465590. The cubic root of 1220332909 is about 1068.6269134310.

The spelling of 1220332909 in words is "one billion, two hundred twenty million, three hundred thirty-two thousand, nine hundred nine".