128307763 has 4 divisors (see below), whose sum is σ = 128336800. Its totient is φ = 128278728.

The previous prime is 128307757. The next prime is 128307811. The reversal of 128307763 is 367703821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 367703821 = 5179 ⋅70999.

It is a cyclic number.

It is not a de Polignac number, because 128307763 - 2⁹ = 128307251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128307563) 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, 6363 + ... + 17236.

It is an arithmetic number, because the mean of its divisors is an integer number (32084200).

Almost surely, 2^128307763 is an apocalyptic number.

128307763 is a deficient number, since it is larger than the sum of its proper divisors (29037).

128307763 is an equidigital number, since it uses as much as digits as its factorization.

128307763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29036.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 128307763 is about 11327.3016645625. The cubic root of 128307763 is about 504.3720102937.

The spelling of 128307763 in words is "one hundred twenty-eight million, three hundred seven thousand, seven hundred sixty-three".