727421357 has 4 divisors (see below), whose sum is σ = 783376860. Its totient is φ = 671465856.

The previous prime is 727421353. The next prime is 727421363. The reversal of 727421357 is 753124727.

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 72777961 + 654643396 = 8531^2 + 25586^2 .

It is a cyclic number.

It is not a de Polignac number, because 727421357 - 2² = 727421353 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 727421357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (727421351) 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 3 ways as a sum of consecutive naturals, for example, 27977732 + ... + 27977757.

It is an arithmetic number, because the mean of its divisors is an integer number (195844215).

Almost surely, 2^727421357 is an apocalyptic number.

It is an amenable number.

727421357 is a deficient number, since it is larger than the sum of its proper divisors (55955503).

727421357 is a wasteful number, since it uses less digits than its factorization.

727421357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55955502.

The product of its digits is 82320, while the sum is 38.

The square root of 727421357 is about 26970.7500266492. The cubic root of 727421357 is about 899.3498831748.

The spelling of 727421357 in words is "seven hundred twenty-seven million, four hundred twenty-one thousand, three hundred fifty-seven".