71443693 has 2 divisors, whose sum is σ = 71443694. Its totient is φ = 71443692.

The previous prime is 71443657. The next prime is 71443699. The reversal of 71443693 is 39634417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43533604 + 27910089 = 6598^2 + 5283^2 .

It is an emirp because it is prime and its reverse (39634417) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71443693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71443699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35721846 + 35721847.

It is an arithmetic number, because the mean of its divisors is an integer number (35721847).

Almost surely, 2^71443693 is an apocalyptic number.

It is an amenable number.

71443693 is a deficient number, since it is larger than the sum of its proper divisors (1).

71443693 is an equidigital number, since it uses as much as digits as its factorization.

71443693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 71443693 is about 8452.4371041730. The cubic root of 71443693 is about 414.9425439400.

The spelling of 71443693 in words is "seventy-one million, four hundred forty-three thousand, six hundred ninety-three".