128801617 has 8 divisors (see below), whose sum is σ = 147295296. Its totient is φ = 110331312.

The previous prime is 128801609. The next prime is 128801657. The reversal of 128801617 is 716108821.

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

It is not a de Polignac number, because 128801617 - 2³ = 128801609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128801657) 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, 8238 + ... + 18040.

It is an arithmetic number, because the mean of its divisors is an integer number (18411912).

Almost surely, 2^128801617 is an apocalyptic number.

It is an amenable number.

128801617 is a deficient number, since it is larger than the sum of its proper divisors (18493679).

128801617 is an equidigital number, since it uses as much as digits as its factorization.

128801617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11687.

The product of its (nonzero) digits is 5376, while the sum is 34.

The square root of 128801617 is about 11349.0800067671. The cubic root of 128801617 is about 505.0182877408.

The spelling of 128801617 in words is "one hundred twenty-eight million, eight hundred one thousand, six hundred seventeen".