72717353 has 4 divisors (see below), whose sum is σ = 72737028. Its totient is φ = 72697680.

The previous prime is 72717317. The next prime is 72717371. The reversal of 72717353 is 35371727.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51437584 + 21279769 = 7172^2 + 4613^2 .

It is a cyclic number.

It is not a de Polignac number, because 72717353 - 2⁸ = 72717097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72717553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2438 + ... + 12303.

It is an arithmetic number, because the mean of its divisors is an integer number (18184257).

Almost surely, 2^72717353 is an apocalyptic number.

It is an amenable number.

72717353 is a deficient number, since it is larger than the sum of its proper divisors (19675).

72717353 is a wasteful number, since it uses less digits than its factorization.

72717353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19674.

The product of its digits is 30870, while the sum is 35.

The square root of 72717353 is about 8527.4470388270. The cubic root of 72717353 is about 417.3938257747.

The spelling of 72717353 in words is "seventy-two million, seven hundred seventeen thousand, three hundred fifty-three".