128959713 has 6 divisors (see below), whose sum is σ = 186275154. Its totient is φ = 85973136.

The previous prime is 128959711. The next prime is 128959751. The reversal of 128959713 is 317959821.

It can be written as a sum of positive squares in only one way, i.e., 128867904 + 91809 = 11352^2 + 303^2 .

It is not a de Polignac number, because 128959713 - 2¹ = 128959711 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128959711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7164420 + ... + 7164437.

It is an arithmetic number, because the mean of its divisors is an integer number (31045859).

Almost surely, 2^128959713 is an apocalyptic number.

It is an amenable number.

128959713 is a deficient number, since it is larger than the sum of its proper divisors (57315441).

128959713 is a wasteful number, since it uses less digits than its factorization.

128959713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14328863 (or 14328860 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 128959713 is about 11356.0430168259. The cubic root of 128959713 is about 505.2248294716.

The spelling of 128959713 in words is "one hundred twenty-eight million, nine hundred fifty-nine thousand, seven hundred thirteen".