120312289 has 2 divisors, whose sum is σ = 120312290. Its totient is φ = 120312288.

The previous prime is 120312263. The next prime is 120312359. The reversal of 120312289 is 982213021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117353889 + 2958400 = 10833^2 + 1720^2 .

It is a cyclic number.

It is not a de Polignac number, because 120312289 - 2²¹ = 118215137 is a prime.

It is not a weakly prime, because it can be changed into another prime (120312239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60156144 + 60156145.

It is an arithmetic number, because the mean of its divisors is an integer number (60156145).

Almost surely, 2^120312289 is an apocalyptic number.

It is an amenable number.

120312289 is a deficient number, since it is larger than the sum of its proper divisors (1).

120312289 is an equidigital number, since it uses as much as digits as its factorization.

120312289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 120312289 is about 10968.6958659633. The cubic root of 120312289 is about 493.6699169589.

The spelling of 120312289 in words is "one hundred twenty million, three hundred twelve thousand, two hundred eighty-nine".