728169100123 has 2 divisors, whose sum is σ = 728169100124. Its totient is φ = 728169100122.

The previous prime is 728169100121. The next prime is 728169100199. The reversal of 728169100123 is 321001961827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728169100123 - 2¹ = 728169100121 is a prime.

Together with 728169100121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (728169100121) 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, 364084550061 + 364084550062.

It is an arithmetic number, because the mean of its divisors is an integer number (364084550062).

Almost surely, 2^728169100123 is an apocalyptic number.

728169100123 is a deficient number, since it is larger than the sum of its proper divisors (1).

728169100123 is an equidigital number, since it uses as much as digits as its factorization.

728169100123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 728169100123 in words is "seven hundred twenty-eight billion, one hundred sixty-nine million, one hundred thousand, one hundred twenty-three".