128862277 has 2 divisors, whose sum is σ = 128862278. Its totient is φ = 128862276.

The previous prime is 128862241. The next prime is 128862287. The reversal of 128862277 is 772268821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124858276 + 4004001 = 11174^2 + 2001^2 .

It is an emirp because it is prime and its reverse (772268821) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128862277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128862287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64431138 + 64431139.

It is an arithmetic number, because the mean of its divisors is an integer number (64431139).

Almost surely, 2^128862277 is an apocalyptic number.

It is an amenable number.

128862277 is a deficient number, since it is larger than the sum of its proper divisors (1).

128862277 is an equidigital number, since it uses as much as digits as its factorization.

128862277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 43.

The square root of 128862277 is about 11351.7521555045. The cubic root of 128862277 is about 505.0975559005.

The spelling of 128862277 in words is "one hundred twenty-eight million, eight hundred sixty-two thousand, two hundred seventy-seven".