43091262689 has 2 divisors, whose sum is σ = 43091262690. Its totient is φ = 43091262688.

The previous prime is 43091262653. The next prime is 43091262701. The reversal of 43091262689 is 98626219034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31293610000 + 11797652689 = 176900^2 + 108617^2 .

It is a cyclic number.

It is not a de Polignac number, because 43091262689 - 2²⁰ = 43090214113 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 (43091262589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21545631344 + 21545631345.

It is an arithmetic number, because the mean of its divisors is an integer number (21545631345).

Almost surely, 2^43091262689 is an apocalyptic number.

It is an amenable number.

43091262689 is a deficient number, since it is larger than the sum of its proper divisors (1).

43091262689 is an equidigital number, since it uses as much as digits as its factorization.

43091262689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 43091262689 in words is "forty-three billion, ninety-one million, two hundred sixty-two thousand, six hundred eighty-nine".