728682991 has 2 divisors, whose sum is σ = 728682992. Its totient is φ = 728682990.

The previous prime is 728682973. The next prime is 728683009. The reversal of 728682991 is 199286827.

It is a balanced prime because it is at equal distance from previous prime (728682973) and next prime (728683009).

It is a cyclic number.

It is not a de Polignac number, because 728682991 - 2⁵ = 728682959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728688991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364341495 + 364341496.

It is an arithmetic number, because the mean of its divisors is an integer number (364341496).

Almost surely, 2^728682991 is an apocalyptic number.

728682991 is a deficient number, since it is larger than the sum of its proper divisors (1).

728682991 is an equidigital number, since it uses as much as digits as its factorization.

728682991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 52.

The square root of 728682991 is about 26994.1288246167. The cubic root of 728682991 is about 899.8695247070.

The spelling of 728682991 in words is "seven hundred twenty-eight million, six hundred eighty-two thousand, nine hundred ninety-one".