727974361 has 3 divisors (see below), whose sum is σ = 728001343. Its totient is φ = 727947380.

The previous prime is 727974353. The next prime is 727974383. The reversal of 727974361 is 163479727.

The square root of 727974361 is 26981.

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.

It can be written as a sum of positive squares in only one way, i.e., 79762761 + 648211600 = 8931^2 + 25460^2 .

It is not a de Polignac number, because 727974361 - 2³ = 727974353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (727974301) 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 2 ways as a sum of consecutive naturals, for example, 13491 + ... + 40471.

Almost surely, 2^727974361 is an apocalyptic number.

727974361 is the 26981-st square number.

727974361 is the 13491-st centered octagonal number.

It is an amenable number.

727974361 is a deficient number, since it is larger than the sum of its proper divisors (26982).

727974361 is an frugal number, since it uses more digits than its factorization.

727974361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53962 (or 26981 counting only the distinct ones).

The product of its digits is 444528, while the sum is 46.

The cubic root of 727974361 is about 899.5777282424.

The spelling of 727974361 in words is "seven hundred twenty-seven million, nine hundred seventy-four thousand, three hundred sixty-one".