728992871 has 2 divisors, whose sum is σ = 728992872. Its totient is φ = 728992870.

The previous prime is 728992841. The next prime is 728992877. The reversal of 728992871 is 178299827.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 728992871 - 2¹⁰ = 728991847 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728992877) 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, 364496435 + 364496436.

It is an arithmetic number, because the mean of its divisors is an integer number (364496436).

Almost surely, 2^728992871 is an apocalyptic number.

728992871 is a deficient number, since it is larger than the sum of its proper divisors (1).

728992871 is an equidigital number, since it uses as much as digits as its factorization.

728992871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 53.

The square root of 728992871 is about 26999.8679811587. The cubic root of 728992871 is about 899.9970662456.

The spelling of 728992871 in words is "seven hundred twenty-eight million, nine hundred ninety-two thousand, eight hundred seventy-one".