120999589 has 2 divisors, whose sum is σ = 120999590. Its totient is φ = 120999588.

The previous prime is 120999563. The next prime is 120999601. The reversal of 120999589 is 985999021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80460900 + 40538689 = 8970^2 + 6367^2 .

It is a cyclic number.

It is not a de Polignac number, because 120999589 - 2¹⁹ = 120475301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120999089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60499794 + 60499795.

It is an arithmetic number, because the mean of its divisors is an integer number (60499795).

Almost surely, 2^120999589 is an apocalyptic number.

It is an amenable number.

120999589 is a deficient number, since it is larger than the sum of its proper divisors (1).

120999589 is an equidigital number, since it uses as much as digits as its factorization.

120999589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 52.

The square root of 120999589 is about 10999.9813181660. The cubic root of 120999589 is about 494.6081843127.

The spelling of 120999589 in words is "one hundred twenty million, nine hundred ninety-nine thousand, five hundred eighty-nine".