128680933 has 2 divisors, whose sum is σ = 128680934. Its totient is φ = 128680932.

The previous prime is 128680927. The next prime is 128680961. The reversal of 128680933 is 339086821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93373569 + 35307364 = 9663^2 + 5942^2 .

It is a cyclic number.

It is not a de Polignac number, because 128680933 - 2²¹ = 126583781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128680333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64340466 + 64340467.

It is an arithmetic number, because the mean of its divisors is an integer number (64340467).

Almost surely, 2^128680933 is an apocalyptic number.

It is an amenable number.

128680933 is a deficient number, since it is larger than the sum of its proper divisors (1).

128680933 is an equidigital number, since it uses as much as digits as its factorization.

128680933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 128680933 is about 11343.7618539883. The cubic root of 128680933 is about 504.8605084783.

The spelling of 128680933 in words is "one hundred twenty-eight million, six hundred eighty thousand, nine hundred thirty-three".