728606672749 has 2 divisors, whose sum is σ = 728606672750. Its totient is φ = 728606672748.

The previous prime is 728606672669. The next prime is 728606672777. The reversal of 728606672749 is 947276606827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 698778964900 + 29827707849 = 835930^2 + 172707^2 .

It is an emirp because it is prime and its reverse (947276606827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 728606672749 - 2²¹ = 728604575597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728606675749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364303336374 + 364303336375.

It is an arithmetic number, because the mean of its divisors is an integer number (364303336375).

Almost surely, 2^728606672749 is an apocalyptic number.

It is an amenable number.

728606672749 is a deficient number, since it is larger than the sum of its proper divisors (1).

728606672749 is an equidigital number, since it uses as much as digits as its factorization.

728606672749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 85349376, while the sum is 64.

The spelling of 728606672749 in words is "seven hundred twenty-eight billion, six hundred six million, six hundred seventy-two thousand, seven hundred forty-nine".