120655009 has 2 divisors, whose sum is σ = 120655010. Its totient is φ = 120655008.

The previous prime is 120654983. The next prime is 120655021. The reversal of 120655009 is 900556021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112954384 + 7700625 = 10628^2 + 2775^2 .

It is a cyclic number.

It is not a de Polignac number, because 120655009 - 2⁹ = 120654497 is a prime.

It is not a weakly prime, because it can be changed into another prime (120625009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60327504 + 60327505.

It is an arithmetic number, because the mean of its divisors is an integer number (60327505).

Almost surely, 2^120655009 is an apocalyptic number.

It is an amenable number.

120655009 is a deficient number, since it is larger than the sum of its proper divisors (1).

120655009 is an equidigital number, since it uses as much as digits as its factorization.

120655009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 120655009 is about 10984.3073973738. The cubic root of 120655009 is about 494.1382264385.

The spelling of 120655009 in words is "one hundred twenty million, six hundred fifty-five thousand, nine".