128924773 has 2 divisors, whose sum is σ = 128924774. Its totient is φ = 128924772.

The previous prime is 128924771. The next prime is 128924801. The reversal of 128924773 is 377429821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106853569 + 22071204 = 10337^2 + 4698^2 .

It is an emirp because it is prime and its reverse (377429821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128924773 - 2¹ = 128924771 is a prime.

Together with 128924771, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128924771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64462386 + 64462387.

It is an arithmetic number, because the mean of its divisors is an integer number (64462387).

Almost surely, 2^128924773 is an apocalyptic number.

It is an amenable number.

128924773 is a deficient number, since it is larger than the sum of its proper divisors (1).

128924773 is an equidigital number, since it uses as much as digits as its factorization.

128924773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 43.

The square root of 128924773 is about 11354.5045246369. The cubic root of 128924773 is about 505.1791972618.

It can be divided in two parts, 12892 and 4773, that multiplied together give a palindrome (61533516).

The spelling of 128924773 in words is "one hundred twenty-eight million, nine hundred twenty-four thousand, seven hundred seventy-three".