128711659 has 4 divisors (see below), whose sum is σ = 132863680. Its totient is φ = 124559640.

The previous prime is 128711621. The next prime is 128711663. The reversal of 128711659 is 956117821.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 128711659 - 2¹³ = 128703467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128711699) 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, 2075964 + ... + 2076025.

It is an arithmetic number, because the mean of its divisors is an integer number (33215920).

Almost surely, 2^128711659 is an apocalyptic number.

128711659 is a deficient number, since it is larger than the sum of its proper divisors (4152021).

128711659 is an equidigital number, since it uses as much as digits as its factorization.

128711659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4152020.

The product of its digits is 30240, while the sum is 40.

The square root of 128711659 is about 11345.1160857878. The cubic root of 128711659 is about 504.9006882447.

The spelling of 128711659 in words is "one hundred twenty-eight million, seven hundred eleven thousand, six hundred fifty-nine".