728666927 has 2 divisors, whose sum is σ = 728666928. Its totient is φ = 728666926.

The previous prime is 728666921. The next prime is 728666989. The reversal of 728666927 is 729666827.

It is a weak prime.

It is an emirp because it is prime and its reverse (729666827) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728666927 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 (728666921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364333463 + 364333464.

It is an arithmetic number, because the mean of its divisors is an integer number (364333464).

Almost surely, 2^728666927 is an apocalyptic number.

728666927 is a deficient number, since it is larger than the sum of its proper divisors (1).

728666927 is an equidigital number, since it uses as much as digits as its factorization.

728666927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 53.

The square root of 728666927 is about 26993.8312767936. The cubic root of 728666927 is about 899.8629120416.

The spelling of 728666927 in words is "seven hundred twenty-eight million, six hundred sixty-six thousand, nine hundred twenty-seven".