728227663 has 2 divisors, whose sum is σ = 728227664. Its totient is φ = 728227662.

The previous prime is 728227631. The next prime is 728227693. The reversal of 728227663 is 366722827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 728227663 - 2⁵ = 728227631 is a prime.

It is equal to p_37637665 and since 728227663 and 37637665 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728227693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364113831 + 364113832.

It is an arithmetic number, because the mean of its divisors is an integer number (364113832).

Almost surely, 2^728227663 is an apocalyptic number.

728227663 is a deficient number, since it is larger than the sum of its proper divisors (1).

728227663 is an equidigital number, since it uses as much as digits as its factorization.

728227663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 43.

The square root of 728227663 is about 26985.6936727593. The cubic root of 728227663 is about 899.6820535347.

The spelling of 728227663 in words is "seven hundred twenty-eight million, two hundred twenty-seven thousand, six hundred sixty-three".