128579077 has 12 divisors (see below), whose sum is σ = 141605100. Its totient is φ = 116663360.

The previous prime is 128579071. The next prime is 128579111. The reversal of 128579077 is 770975821.

It can be written as a sum of positive squares in 2 ways, for example, as 47416996 + 81162081 = 6886^2 + 9009^2 .

It is a de Polignac number, because none of the positive numbers 2^k-128579077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128579071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122049 + ... + 123097.

It is an arithmetic number, because the mean of its divisors is an integer number (11800425).

Almost surely, 2^128579077 is an apocalyptic number.

It is an amenable number.

128579077 is a deficient number, since it is larger than the sum of its proper divisors (13026023).

128579077 is a wasteful number, since it uses less digits than its factorization.

128579077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084 (or 2073 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 46.

The square root of 128579077 is about 11339.2714492599. The cubic root of 128579077 is about 504.7272676929.

The spelling of 128579077 in words is "one hundred twenty-eight million, five hundred seventy-nine thousand, seventy-seven".