128650697 has 8 divisors (see below), whose sum is σ = 147193152. Its totient is φ = 110149200.

The previous prime is 128650693. The next prime is 128650721. The reversal of 128650697 is 796056821.

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

It is not a de Polignac number, because 128650697 - 2² = 128650693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128650693) 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, 3179 + ... + 16352.

It is an arithmetic number, because the mean of its divisors is an integer number (18399144).

Almost surely, 2^128650697 is an apocalyptic number.

It is an amenable number.

128650697 is a deficient number, since it is larger than the sum of its proper divisors (18542455).

128650697 is an equidigital number, since it uses as much as digits as its factorization.

128650697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20479.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 128650697 is about 11342.4290608317. The cubic root of 128650697 is about 504.8209632306.

The spelling of 128650697 in words is "one hundred twenty-eight million, six hundred fifty thousand, six hundred ninety-seven".