727743780241 has 3 divisors (see below), whose sum is σ = 727744633321. Its totient is φ = 727742927162.

The previous prime is 727743780227. The next prime is 727743780251. The reversal of 727743780241 is 142087347727.

It is a happy number.

The square root of 727743780241 is 853079.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 142087347727 = 13 ⋅10929795979.

It is not a de Polignac number, because 727743780241 - 2⁵ = 727743780209 is a prime.

It is a super-2 number, since 2×727743780241² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (727743780251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 426540 + ... + 1279618.

Almost surely, 2^727743780241 is an apocalyptic number.

727743780241 is the 853079-th square number.

727743780241 is the 426540-th centered octagonal number.

It is an amenable number.

727743780241 is a deficient number, since it is larger than the sum of its proper divisors (853080).

727743780241 is an frugal number, since it uses more digits than its factorization.

727743780241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706158 (or 853079 counting only the distinct ones).

The product of its (nonzero) digits is 3687936, while the sum is 52.

It can be divided in two parts, 727743 and 780241, that added together give a square (1507984 = 1228²).

The spelling of 727743780241 in words is "seven hundred twenty-seven billion, seven hundred forty-three million, seven hundred eighty thousand, two hundred forty-one".