728969 has 2 divisors, whose sum is σ = 728970. Its totient is φ = 728968.

The previous prime is 728953. The next prime is 728971. The reversal of 728969 is 969827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 384400 + 344569 = 620^2 + 587^2 .

It is a cyclic number.

It is not a de Polignac number, because 728969 - 2⁴ = 728953 is a prime.

It is a super-2 number, since 2×728969² = 1062791605922, which contains 22 as substring.

Together with 728971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (728929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364484 + 364485.

It is an arithmetic number, because the mean of its divisors is an integer number (364485).

2⁷²⁸⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

728969 is a deficient number, since it is larger than the sum of its proper divisors (1).

728969 is an equidigital number, since it uses as much as digits as its factorization.

728969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 728969 is about 853.7968142363. The cubic root of 728969 is about 89.9987242618.

The spelling of 728969 in words is "seven hundred twenty-eight thousand, nine hundred sixty-nine".