128226773 has 2 divisors, whose sum is σ = 128226774. Its totient is φ = 128226772.

The previous prime is 128226743. The next prime is 128226779. The reversal of 128226773 is 377622821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118875409 + 9351364 = 10903^2 + 3058^2 .

It is a cyclic number.

It is not a de Polignac number, because 128226773 - 2²⁰ = 127178197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128226779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64113386 + 64113387.

It is an arithmetic number, because the mean of its divisors is an integer number (64113387).

Almost surely, 2^128226773 is an apocalyptic number.

It is an amenable number.

128226773 is a deficient number, since it is larger than the sum of its proper divisors (1).

128226773 is an equidigital number, since it uses as much as digits as its factorization.

128226773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 38.

The square root of 128226773 is about 11323.7261093688. The cubic root of 128226773 is about 504.2658652821.

The spelling of 128226773 in words is "one hundred twenty-eight million, two hundred twenty-six thousand, seven hundred seventy-three".