755720689 has 2 divisors, whose sum is σ = 755720690. Its totient is φ = 755720688.

The previous prime is 755720617. The next prime is 755720711. The reversal of 755720689 is 986027557.

755720689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 587577600 + 168143089 = 24240^2 + 12967^2 .

It is a cyclic number.

It is not a de Polignac number, because 755720689 - 2¹⁵ = 755687921 is a prime.

It is a super-2 number, since 2×755720689² = 1142227519565269442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (755720389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 377860344 + 377860345.

It is an arithmetic number, because the mean of its divisors is an integer number (377860345).

Almost surely, 2^755720689 is an apocalyptic number.

It is an amenable number.

755720689 is a deficient number, since it is larger than the sum of its proper divisors (1).

755720689 is an equidigital number, since it uses as much as digits as its factorization.

755720689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The square root of 755720689 is about 27490.3744790790. The cubic root of 755720689 is about 910.8644882325.

The spelling of 755720689 in words is "seven hundred fifty-five million, seven hundred twenty thousand, six hundred eighty-nine".