120578609 has 2 divisors, whose sum is σ = 120578610. Its totient is φ = 120578608.

The previous prime is 120578599. The next prime is 120578629. The reversal of 120578609 is 906875021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117505600 + 3073009 = 10840^2 + 1753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120578609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120578629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60289304 + 60289305.

It is an arithmetic number, because the mean of its divisors is an integer number (60289305).

Almost surely, 2^120578609 is an apocalyptic number.

It is an amenable number.

120578609 is a deficient number, since it is larger than the sum of its proper divisors (1).

120578609 is an equidigital number, since it uses as much as digits as its factorization.

120578609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 120578609 is about 10980.8291581283. The cubic root of 120578609 is about 494.0339066042.

The spelling of 120578609 in words is "one hundred twenty million, five hundred seventy-eight thousand, six hundred nine".