728929727 has 2 divisors, whose sum is σ = 728929728. Its totient is φ = 728929726.

The previous prime is 728929697. The next prime is 728929739. The reversal of 728929727 is 727929827.

It is a strong prime.

It is an emirp because it is prime and its reverse (727929827) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728929727 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 (728929787) 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, 364464863 + 364464864.

It is an arithmetic number, because the mean of its divisors is an integer number (364464864).

Almost surely, 2^728929727 is an apocalyptic number.

728929727 is a deficient number, since it is larger than the sum of its proper divisors (1).

728929727 is an equidigital number, since it uses as much as digits as its factorization.

728929727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 53.

The square root of 728929727 is about 26998.6986167852. The cubic root of 728929727 is about 899.9710801407.

The spelling of 728929727 in words is "seven hundred twenty-eight million, nine hundred twenty-nine thousand, seven hundred twenty-seven".