71143717 has 4 divisors (see below), whose sum is σ = 71189280. Its totient is φ = 71098156.

The previous prime is 71143703. The next prime is 71143739. The reversal of 71143717 is 71734117.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71143717 - 2¹⁹ = 70619429 is a prime.

It is a super-2 number, since 2×71143717² = 10122856937152178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71143747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20353 + ... + 23590.

It is an arithmetic number, because the mean of its divisors is an integer number (17797320).

Almost surely, 2^71143717 is an apocalyptic number.

It is an amenable number.

71143717 is a deficient number, since it is larger than the sum of its proper divisors (45563).

71143717 is a wasteful number, since it uses less digits than its factorization.

71143717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45562.

The product of its digits is 4116, while the sum is 31.

The square root of 71143717 is about 8434.6734969411. The cubic root of 71143717 is about 414.3609790836.

The spelling of 71143717 in words is "seventy-one million, one hundred forty-three thousand, seven hundred seventeen".