71197943 has 2 divisors, whose sum is σ = 71197944. Its totient is φ = 71197942.

The previous prime is 71197913. The next prime is 71197963. The reversal of 71197943 is 34979117.

It is a strong prime.

It is an emirp because it is prime and its reverse (34979117) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71197943 - 2²⁰ = 70149367 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71197943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71197913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35598971 + 35598972.

It is an arithmetic number, because the mean of its divisors is an integer number (35598972).

Almost surely, 2^71197943 is an apocalyptic number.

71197943 is a deficient number, since it is larger than the sum of its proper divisors (1).

71197943 is an equidigital number, since it uses as much as digits as its factorization.

71197943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 41.

The square root of 71197943 is about 8437.8873540715. The cubic root of 71197943 is about 414.4662281631.

The spelling of 71197943 in words is "seventy-one million, one hundred ninety-seven thousand, nine hundred forty-three".