43506893317 has 2 divisors, whose sum is σ = 43506893318. Its totient is φ = 43506893316.

The previous prime is 43506893303. The next prime is 43506893383. The reversal of 43506893317 is 71339860534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28196790561 + 15310102756 = 167919^2 + 123734^2 .

It is a cyclic number.

It is not a de Polignac number, because 43506893317 - 2⁷ = 43506893189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43506803317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21753446658 + 21753446659.

It is an arithmetic number, because the mean of its divisors is an integer number (21753446659).

Almost surely, 2^43506893317 is an apocalyptic number.

It is an amenable number.

43506893317 is a deficient number, since it is larger than the sum of its proper divisors (1).

43506893317 is an equidigital number, since it uses as much as digits as its factorization.

43506893317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1632960, while the sum is 49.

The spelling of 43506893317 in words is "forty-three billion, five hundred six million, eight hundred ninety-three thousand, three hundred seventeen".