728207999 has 2 divisors, whose sum is σ = 728208000. Its totient is φ = 728207998.

The previous prime is 728207993. The next prime is 728208023. The reversal of 728207999 is 999702827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728207999 - 2⁴ = 728207983 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 728207999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (728207993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364103999 + 364104000.

It is an arithmetic number, because the mean of its divisors is an integer number (364104000).

Almost surely, 2^728207999 is an apocalyptic number.

728207999 is a deficient number, since it is larger than the sum of its proper divisors (1).

728207999 is an equidigital number, since it uses as much as digits as its factorization.

728207999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 728207999 is about 26985.3293291003. The cubic root of 728207999 is about 899.6739555602.

The spelling of 728207999 in words is "seven hundred twenty-eight million, two hundred seven thousand, nine hundred ninety-nine".