72720303 has 16 divisors (see below), whose sum is σ = 98879616. Its totient is φ = 47530400.

The previous prime is 72720287. The next prime is 72720311. The reversal of 72720303 is 30302727.

It is a cyclic number.

It is not a de Polignac number, because 72720303 - 2⁴ = 72720287 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72770303) 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 15 ways as a sum of consecutive naturals, for example, 31300 + ... + 33542.

It is an arithmetic number, because the mean of its divisors is an integer number (6179976).

Almost surely, 2^72720303 is an apocalyptic number.

72720303 is a deficient number, since it is larger than the sum of its proper divisors (26159313).

72720303 is a wasteful number, since it uses less digits than its factorization.

72720303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454.

The product of its (nonzero) digits is 1764, while the sum is 24.

The square root of 72720303 is about 8527.6200079506. The cubic root of 72720303 is about 417.3994699806.

The spelling of 72720303 in words is "seventy-two million, seven hundred twenty thousand, three hundred three".