43613657089 has 2 divisors, whose sum is σ = 43613657090. Its totient is φ = 43613657088.

The previous prime is 43613657083. The next prime is 43613657203. The reversal of 43613657089 is 98075631634.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27180468225 + 16433188864 = 164865^2 + 128192^2 .

It is a cyclic number.

It is not a de Polignac number, because 43613657089 - 2²⁹ = 43076786177 is a prime.

It is not a weakly prime, because it can be changed into another prime (43613657083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21806828544 + 21806828545.

It is an arithmetic number, because the mean of its divisors is an integer number (21806828545).

Almost surely, 2^43613657089 is an apocalyptic number.

It is an amenable number.

43613657089 is a deficient number, since it is larger than the sum of its proper divisors (1).

43613657089 is an equidigital number, since it uses as much as digits as its factorization.

43613657089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 43613657089 in words is "forty-three billion, six hundred thirteen million, six hundred fifty-seven thousand, eighty-nine".