128680567 has 2 divisors, whose sum is σ = 128680568. Its totient is φ = 128680566.

The previous prime is 128680549. The next prime is 128680577. The reversal of 128680567 is 765086821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128680567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128680547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64340283 + 64340284.

It is an arithmetic number, because the mean of its divisors is an integer number (64340284).

Almost surely, 2^128680567 is an apocalyptic number.

128680567 is a deficient number, since it is larger than the sum of its proper divisors (1).

128680567 is an equidigital number, since it uses as much as digits as its factorization.

128680567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 128680567 is about 11343.7457217623. The cubic root of 128680567 is about 504.8600298290.

The spelling of 128680567 in words is "one hundred twenty-eight million, six hundred eighty thousand, five hundred sixty-seven".