728611286717 has 2 divisors, whose sum is σ = 728611286718. Its totient is φ = 728611286716.

The previous prime is 728611286657. The next prime is 728611286749. The reversal of 728611286717 is 717682116827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 691806399001 + 36804887716 = 831749^2 + 191846^2 .

It is a cyclic number.

It is not a de Polignac number, because 728611286717 - 2³² = 724316319421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728611286017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364305643358 + 364305643359.

It is an arithmetic number, because the mean of its divisors is an integer number (364305643359).

Almost surely, 2^728611286717 is an apocalyptic number.

It is an amenable number.

728611286717 is a deficient number, since it is larger than the sum of its proper divisors (1).

728611286717 is an equidigital number, since it uses as much as digits as its factorization.

728611286717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3161088, while the sum is 56.

The spelling of 728611286717 in words is "seven hundred twenty-eight billion, six hundred eleven million, two hundred eighty-six thousand, seven hundred seventeen".