120689 has 2 divisors, whose sum is σ = 120690. Its totient is φ = 120688.

The previous prime is 120677. The next prime is 120691. The reversal of 120689 is 986021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112225 + 8464 = 335^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 120689 - 2¹² = 116593 is a prime.

Together with 120691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60344 + 60345.

It is an arithmetic number, because the mean of its divisors is an integer number (60345).

2¹²⁰⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

120689 is a deficient number, since it is larger than the sum of its proper divisors (1).

120689 is an equidigital number, since it uses as much as digits as its factorization.

120689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 120689 is about 347.4032239344. The cubic root of 120689 is about 49.4184625052.

The spelling of 120689 in words is "one hundred twenty thousand, six hundred eighty-nine".