71728303 has 4 divisors (see below), whose sum is σ = 71871408. Its totient is φ = 71585200.

The previous prime is 71728301. The next prime is 71728333. The reversal of 71728303 is 30382717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30382717 = 2311 ⋅13147.

It is a cyclic number.

It is not a de Polignac number, because 71728303 - 2¹ = 71728301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71728301) 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, 70798 + ... + 71803.

It is an arithmetic number, because the mean of its divisors is an integer number (17967852).

Almost surely, 2^71728303 is an apocalyptic number.

71728303 is a deficient number, since it is larger than the sum of its proper divisors (143105).

71728303 is a wasteful number, since it uses less digits than its factorization.

71728303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143104.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 71728303 is about 8469.2563427966. The cubic root of 71728303 is about 415.4928156203.

The spelling of 71728303 in words is "seventy-one million, seven hundred twenty-eight thousand, three hundred three".