72727573 has 4 divisors (see below), whose sum is σ = 76555360. Its totient is φ = 68899788.

The previous prime is 72727561. The next prime is 72727583. The reversal of 72727573 is 37572727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72727573 - 2²¹ = 70630421 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 (72727553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1913865 + ... + 1913902.

It is an arithmetic number, because the mean of its divisors is an integer number (19138840).

Almost surely, 2^72727573 is an apocalyptic number.

It is an amenable number.

72727573 is a deficient number, since it is larger than the sum of its proper divisors (3827787).

72727573 is a wasteful number, since it uses less digits than its factorization.

72727573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3827786.

The product of its digits is 144060, while the sum is 40.

The square root of 72727573 is about 8528.0462592554. The cubic root of 72727573 is about 417.4133789482.

The spelling of 72727573 in words is "seventy-two million, seven hundred twenty-seven thousand, five hundred seventy-three".