728999983 has 2 divisors, whose sum is σ = 728999984. Its totient is φ = 728999982.

The previous prime is 728999981. The next prime is 728999993. The reversal of 728999983 is 389999827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728999983 - 2¹ = 728999981 is a prime.

Together with 728999981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728999981) 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, 364499991 + 364499992.

It is an arithmetic number, because the mean of its divisors is an integer number (364499992).

Almost surely, 2^728999983 is an apocalyptic number.

728999983 is a deficient number, since it is larger than the sum of its proper divisors (1).

728999983 is an equidigital number, since it uses as much as digits as its factorization.

728999983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17635968, while the sum is 64.

The square root of 728999983 is about 26999.9996851852. Note that the first 3 decimals coincide. The cubic root of 728999983 is about 899.9999930041. Note that the first 5 decimals are identical.

The spelling of 728999983 in words is "seven hundred twenty-eight million, nine hundred ninety-nine thousand, nine hundred eighty-three".