128313877 has 2 divisors, whose sum is σ = 128313878. Its totient is φ = 128313876.

The previous prime is 128313869. The next prime is 128313907. The reversal of 128313877 is 778313821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127441521 + 872356 = 11289^2 + 934^2 .

It is a cyclic number.

It is not a de Polignac number, because 128313877 - 2³ = 128313869 is a prime.

It is a super-3 number, since 3×128313877³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128313277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64156938 + 64156939.

It is an arithmetic number, because the mean of its divisors is an integer number (64156939).

Almost surely, 2^128313877 is an apocalyptic number.

It is an amenable number.

128313877 is a deficient number, since it is larger than the sum of its proper divisors (1).

128313877 is an equidigital number, since it uses as much as digits as its factorization.

128313877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 128313877 is about 11327.5715402729. The cubic root of 128313877 is about 504.3800214523.

The spelling of 128313877 in words is "one hundred twenty-eight million, three hundred thirteen thousand, eight hundred seventy-seven".