72711543 has 4 divisors (see below), whose sum is σ = 96948728. Its totient is φ = 48474360.

The previous prime is 72711539. The next prime is 72711557. The reversal of 72711543 is 34511727.

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

It is not a de Polignac number, because 72711543 - 2² = 72711539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72711543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72711563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12118588 + ... + 12118593.

It is an arithmetic number, because the mean of its divisors is an integer number (24237182).

Almost surely, 2^72711543 is an apocalyptic number.

72711543 is a deficient number, since it is larger than the sum of its proper divisors (24237185).

72711543 is a wasteful number, since it uses less digits than its factorization.

72711543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24237184.

The product of its digits is 5880, while the sum is 30.

The square root of 72711543 is about 8527.1063673441. The cubic root of 72711543 is about 417.3827091126.

The spelling of 72711543 in words is "seventy-two million, seven hundred eleven thousand, five hundred forty-three".