71147743 has 4 divisors (see below), whose sum is σ = 71278360. Its totient is φ = 71017128.

The previous prime is 71147731. The next prime is 71147749. The reversal of 71147743 is 34774117.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71147743 - 2⁹ = 71147231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71147699 and 71147708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71147749) 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, 64488 + ... + 65581.

It is an arithmetic number, because the mean of its divisors is an integer number (17819590).

Almost surely, 2^71147743 is an apocalyptic number.

71147743 is a deficient number, since it is larger than the sum of its proper divisors (130617).

71147743 is a wasteful number, since it uses less digits than its factorization.

71147743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130616.

The product of its digits is 16464, while the sum is 34.

The square root of 71147743 is about 8434.9121512912. The cubic root of 71147743 is about 414.3687951209.

The spelling of 71147743 in words is "seventy-one million, one hundred forty-seven thousand, seven hundred forty-three".