128887177 has 2 divisors, whose sum is σ = 128887178. Its totient is φ = 128887176.

The previous prime is 128887153. The next prime is 128887261. The reversal of 128887177 is 771788821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128391561 + 495616 = 11331^2 + 704^2 .

It is an emirp because it is prime and its reverse (771788821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128887177 - 2¹¹ = 128885129 is a prime.

It is a super-2 number, since 2×128887177² = 33223808790058658, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128887177.

It is not a weakly prime, because it can be changed into another prime (128827177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64443588 + 64443589.

It is an arithmetic number, because the mean of its divisors is an integer number (64443589).

Almost surely, 2^128887177 is an apocalyptic number.

It is an amenable number.

128887177 is a deficient number, since it is larger than the sum of its proper divisors (1).

128887177 is an equidigital number, since it uses as much as digits as its factorization.

128887177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 351232, while the sum is 49.

The square root of 128887177 is about 11352.8488495179. The cubic root of 128887177 is about 505.1300870634.

The spelling of 128887177 in words is "one hundred twenty-eight million, eight hundred eighty-seven thousand, one hundred seventy-seven".