728654569 has 2 divisors, whose sum is σ = 728654570. Its totient is φ = 728654568.

The previous prime is 728654519. The next prime is 728654581. The reversal of 728654569 is 965456827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654694569 + 73960000 = 25587^2 + 8600^2 .

It is a cyclic number.

It is not a de Polignac number, because 728654569 - 2¹³ = 728646377 is a prime.

It is a super-2 number, since 2×728654569² = 1061874961849151522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (728654519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364327284 + 364327285.

It is an arithmetic number, because the mean of its divisors is an integer number (364327285).

Almost surely, 2^728654569 is an apocalyptic number.

It is an amenable number.

728654569 is a deficient number, since it is larger than the sum of its proper divisors (1).

728654569 is an equidigital number, since it uses as much as digits as its factorization.

728654569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3628800, while the sum is 52.

The square root of 728654569 is about 26993.6023716732. The cubic root of 728654569 is about 899.8578248665.

The spelling of 728654569 in words is "seven hundred twenty-eight million, six hundred fifty-four thousand, five hundred sixty-nine".