727222721 has 2 divisors, whose sum is σ = 727222722. Its totient is φ = 727222720.

The previous prime is 727222711. The next prime is 727222799. The reversal of 727222721 is 127222727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 681471025 + 45751696 = 26105^2 + 6764^2 .

It is a cyclic number.

It is not a de Polignac number, because 727222721 - 2¹⁰ = 727221697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (727222711) 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 as a sum of consecutive naturals, namely, 363611360 + 363611361.

It is an arithmetic number, because the mean of its divisors is an integer number (363611361).

Almost surely, 2^727222721 is an apocalyptic number.

It is an amenable number.

727222721 is a deficient number, since it is larger than the sum of its proper divisors (1).

727222721 is an equidigital number, since it uses as much as digits as its factorization.

727222721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10976, while the sum is 32.

The square root of 727222721 is about 26967.0673414815. The cubic root of 727222721 is about 899.2680142897.

The spelling of 727222721 in words is "seven hundred twenty-seven million, two hundred twenty-two thousand, seven hundred twenty-one".