120440689 has 2 divisors, whose sum is σ = 120440690. Its totient is φ = 120440688.

The previous prime is 120440647. The next prime is 120440693. The reversal of 120440689 is 986044021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112784400 + 7656289 = 10620^2 + 2767^2 .

It is an emirp because it is prime and its reverse (986044021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120440689 - 2¹¹ = 120438641 is a prime.

It is not a weakly prime, because it can be changed into another prime (120440989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60220344 + 60220345.

It is an arithmetic number, because the mean of its divisors is an integer number (60220345).

Almost surely, 2^120440689 is an apocalyptic number.

It is an amenable number.

120440689 is a deficient number, since it is larger than the sum of its proper divisors (1).

120440689 is an equidigital number, since it uses as much as digits as its factorization.

120440689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 120440689 is about 10974.5473255164. The cubic root of 120440689 is about 493.8454730937.

The spelling of 120440689 in words is "one hundred twenty million, four hundred forty thousand, six hundred eighty-nine".