727818849 has 6 divisors (see below), whose sum is σ = 1051293906. Its totient is φ = 485212560.

The previous prime is 727818811. The next prime is 727818851. The reversal of 727818849 is 948818727.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 632170449 + 95648400 = 25143^2 + 9780^2 .

It is a de Polignac number, because none of the positive numbers 2^k-727818849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 727818795 and 727818804.

It is not an unprimeable number, because it can be changed into a prime (727818349) 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 5 ways as a sum of consecutive naturals, for example, 40434372 + ... + 40434389.

It is an arithmetic number, because the mean of its divisors is an integer number (175215651).

Almost surely, 2^727818849 is an apocalyptic number.

It is an amenable number.

727818849 is a deficient number, since it is larger than the sum of its proper divisors (323475057).

727818849 is a wasteful number, since it uses less digits than its factorization.

727818849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80868767 (or 80868764 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 727818849 is about 26978.1179662333. The cubic root of 727818849 is about 899.5136668771.

The spelling of 727818849 in words is "seven hundred twenty-seven million, eight hundred eighteen thousand, eight hundred forty-nine".