128094609 has 8 divisors (see below), whose sum is σ = 180839520. Its totient is φ = 80373056.

The previous prime is 128094607. The next prime is 128094661. The reversal of 128094609 is 906490821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128094609 - 2¹ = 128094607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128094607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1255779 + ... + 1255880.

It is an arithmetic number, because the mean of its divisors is an integer number (22604940).

Almost surely, 2^128094609 is an apocalyptic number.

It is an amenable number.

128094609 is a deficient number, since it is larger than the sum of its proper divisors (52744911).

128094609 is a wasteful number, since it uses less digits than its factorization.

128094609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511679.

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 128094609 is about 11317.8888932521. Note that the first 4 decimals coincide. The cubic root of 128094609 is about 504.0925559105.

The spelling of 128094609 in words is "one hundred twenty-eight million, ninety-four thousand, six hundred nine".