728122091899 has 2 divisors, whose sum is σ = 728122091900. Its totient is φ = 728122091898.

The previous prime is 728122091857. The next prime is 728122091971. The reversal of 728122091899 is 998190221827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728122091899 - 2⁹ = 728122091387 is a prime.

It is a super-2 number, since 2×728122091899² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (728122091299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364061045949 + 364061045950.

It is an arithmetic number, because the mean of its divisors is an integer number (364061045950).

Almost surely, 2^728122091899 is an apocalyptic number.

728122091899 is a deficient number, since it is larger than the sum of its proper divisors (1).

728122091899 is an equidigital number, since it uses as much as digits as its factorization.

728122091899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 58.

The spelling of 728122091899 in words is "seven hundred twenty-eight billion, one hundred twenty-two million, ninety-one thousand, eight hundred ninety-nine".