120663649 has 2 divisors, whose sum is σ = 120663650. Its totient is φ = 120663648.

The previous prime is 120663643. The next prime is 120663667. The reversal of 120663649 is 946366021.

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., 112784400 + 7879249 = 10620^2 + 2807^2 .

It is an emirp because it is prime and its reverse (946366021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120663649 - 2¹⁹ = 120139361 is a prime.

It is not a weakly prime, because it can be changed into another prime (120663643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60331824 + 60331825.

It is an arithmetic number, because the mean of its divisors is an integer number (60331825).

Almost surely, 2^120663649 is an apocalyptic number.

It is an amenable number.

120663649 is a deficient number, since it is larger than the sum of its proper divisors (1).

120663649 is an equidigital number, since it uses as much as digits as its factorization.

120663649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 120663649 is about 10984.7006786712. The cubic root of 120663649 is about 494.1500210929.

The spelling of 120663649 in words is "one hundred twenty million, six hundred sixty-three thousand, six hundred forty-nine".