728947837 has 2 divisors, whose sum is σ = 728947838. Its totient is φ = 728947836.

The previous prime is 728947829. The next prime is 728947847. The reversal of 728947837 is 738749827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480223396 + 248724441 = 21914^2 + 15771^2 .

It is an emirp because it is prime and its reverse (738749827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 728947837 - 2³ = 728947829 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728947847) 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 as a sum of consecutive naturals, namely, 364473918 + 364473919.

It is an arithmetic number, because the mean of its divisors is an integer number (364473919).

Almost surely, 2^728947837 is an apocalyptic number.

It is an amenable number.

728947837 is a deficient number, since it is larger than the sum of its proper divisors (1).

728947837 is an equidigital number, since it uses as much as digits as its factorization.

728947837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4741632, while the sum is 55.

The square root of 728947837 is about 26999.0340012379. The cubic root of 728947837 is about 899.9785332328.

The spelling of 728947837 in words is "seven hundred twenty-eight million, nine hundred forty-seven thousand, eight hundred thirty-seven".