128307683 has 8 divisors (see below), whose sum is σ = 146707968. Its totient is φ = 109925064.

The previous prime is 128307679. The next prime is 128307689. The reversal of 128307683 is 386703821.

It is a happy number.

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 128307683 - 2² = 128307679 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128307689) 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, 20660 + ... + 26142.

It is an arithmetic number, because the mean of its divisors is an integer number (18338496).

Almost surely, 2^128307683 is an apocalyptic number.

128307683 is a deficient number, since it is larger than the sum of its proper divisors (18400285).

128307683 is an equidigital number, since it uses as much as digits as its factorization.

128307683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8833.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 128307683 is about 11327.2981332708. The cubic root of 128307683 is about 504.3719054683.

The spelling of 128307683 in words is "one hundred twenty-eight million, three hundred seven thousand, six hundred eighty-three".