120863609 has 2 divisors, whose sum is σ = 120863610. Its totient is φ = 120863608.

The previous prime is 120863593. The next prime is 120863621. The reversal of 120863609 is 906368021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119355625 + 1507984 = 10925^2 + 1228^2 .

It is a cyclic number.

It is not a de Polignac number, because 120863609 - 2⁴ = 120863593 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (120863629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60431804 + 60431805.

It is an arithmetic number, because the mean of its divisors is an integer number (60431805).

Almost surely, 2^120863609 is an apocalyptic number.

It is an amenable number.

120863609 is a deficient number, since it is larger than the sum of its proper divisors (1).

120863609 is an equidigital number, since it uses as much as digits as its factorization.

120863609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 120863609 is about 10993.7986610634. The cubic root of 120863609 is about 494.4228337350.

The spelling of 120863609 in words is "one hundred twenty million, eight hundred sixty-three thousand, six hundred nine".