656043589 has 2 divisors, whose sum is σ = 656043590. Its totient is φ = 656043588.

The previous prime is 656043547. The next prime is 656043611. The reversal of 656043589 is 985340656.

656043589 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., 537451489 + 118592100 = 23183^2 + 10890^2 .

It is a cyclic number.

It is not a de Polignac number, because 656043589 - 2¹¹ = 656041541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656043529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328021794 + 328021795.

It is an arithmetic number, because the mean of its divisors is an integer number (328021795).

Almost surely, 2^656043589 is an apocalyptic number.

It is an amenable number.

656043589 is a deficient number, since it is larger than the sum of its proper divisors (1).

656043589 is an equidigital number, since it uses as much as digits as its factorization.

656043589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 46.

The square root of 656043589 is about 25613.3478678598. The cubic root of 656043589 is about 868.9155418091.

The spelling of 656043589 in words is "six hundred fifty-six million, forty-three thousand, five hundred eighty-nine".