100128773 has 2 divisors, whose sum is σ = 100128774. Its totient is φ = 100128772.

The previous prime is 100128751. The next prime is 100128797. The reversal of 100128773 is 377821001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90288004 + 9840769 = 9502^2 + 3137^2 .

It is an emirp because it is prime and its reverse (377821001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100128773 - 2⁶ = 100128709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100128733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50064386 + 50064387.

It is an arithmetic number, because the mean of its divisors is an integer number (50064387).

Almost surely, 2^100128773 is an apocalyptic number.

It is an amenable number.

100128773 is a deficient number, since it is larger than the sum of its proper divisors (1).

100128773 is an equidigital number, since it uses as much as digits as its factorization.

100128773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 100128773 is about 10006.4365785228. The cubic root of 100128773 is about 464.3580350075.

Adding to 100128773 its reverse (377821001), we get a palindrome (477949774).

The spelling of 100128773 in words is "one hundred million, one hundred twenty-eight thousand, seven hundred seventy-three".