128064877 has 4 divisors (see below), whose sum is σ = 128182716. Its totient is φ = 127947040.

The previous prime is 128064809. The next prime is 128064887. The reversal of 128064877 is 778460821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40717161 + 87347716 = 6381^2 + 9346^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128064877 is a prime.

It is a super-2 number, since 2×128064877² = 32801225442050258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128064887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57274 + ... + 59467.

It is an arithmetic number, because the mean of its divisors is an integer number (32045679).

Almost surely, 2^128064877 is an apocalyptic number.

It is an amenable number.

128064877 is a deficient number, since it is larger than the sum of its proper divisors (117839).

128064877 is a wasteful number, since it uses less digits than its factorization.

128064877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117838.

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

The square root of 128064877 is about 11316.5753211826. The cubic root of 128064877 is about 504.0535513036.

The spelling of 128064877 in words is "one hundred twenty-eight million, sixty-four thousand, eight hundred seventy-seven".