28743391073 has 2 divisors, whose sum is σ = 28743391074. Its totient is φ = 28743391072.

The previous prime is 28743391009. The next prime is 28743391181. The reversal of 28743391073 is 37019334782.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27537079249 + 1206311824 = 165943^2 + 34732^2 .

It is a cyclic number.

It is not a de Polignac number, because 28743391073 - 2⁶ = 28743391009 is a prime.

It is not a weakly prime, because it can be changed into another prime (28743394073) 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, 14371695536 + 14371695537.

It is an arithmetic number, because the mean of its divisors is an integer number (14371695537).

Almost surely, 2^28743391073 is an apocalyptic number.

It is an amenable number.

28743391073 is a deficient number, since it is larger than the sum of its proper divisors (1).

28743391073 is an equidigital number, since it uses as much as digits as its factorization.

28743391073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 28743391073 in words is "twenty-eight billion, seven hundred forty-three million, three hundred ninety-one thousand, seventy-three".