727346221 has 4 divisors (see below), whose sum is σ = 831252832. Its totient is φ = 623439612.

The previous prime is 727346219. The next prime is 727346267. The reversal of 727346221 is 122643727.

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 727346221 - 2¹ = 727346219 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 (727346281) 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, 51953295 + ... + 51953308.

It is an arithmetic number, because the mean of its divisors is an integer number (207813208).

Almost surely, 2^727346221 is an apocalyptic number.

It is an amenable number.

727346221 is a deficient number, since it is larger than the sum of its proper divisors (103906611).

727346221 is a wasteful number, since it uses less digits than its factorization.

727346221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103906610.

The product of its digits is 28224, while the sum is 34.

The square root of 727346221 is about 26969.3570742797. The cubic root of 727346221 is about 899.3189172250.

Adding to 727346221 its reverse (122643727), we get a palindrome (849989948).

The spelling of 727346221 in words is "seven hundred twenty-seven million, three hundred forty-six thousand, two hundred twenty-one".