939945689 has 2 divisors, whose sum is σ = 939945690. Its totient is φ = 939945688.

The previous prime is 939945679. The next prime is 939945703. The reversal of 939945689 is 986549939.

939945689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 883575625 + 56370064 = 29725^2 + 7508^2 .

It is a cyclic number.

It is not a de Polignac number, because 939945689 - 2²⁴ = 923168473 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (939945649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469972844 + 469972845.

It is an arithmetic number, because the mean of its divisors is an integer number (469972845).

Almost surely, 2^939945689 is an apocalyptic number.

It is an amenable number.

939945689 is a deficient number, since it is larger than the sum of its proper divisors (1).

939945689 is an equidigital number, since it uses as much as digits as its factorization.

939945689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18895680, while the sum is 62.

The square root of 939945689 is about 30658.5337059684. The cubic root of 939945689 is about 979.5672422880.

The spelling of 939945689 in words is "nine hundred thirty-nine million, nine hundred forty-five thousand, six hundred eighty-nine".