128368567 has 2 divisors, whose sum is σ = 128368568. Its totient is φ = 128368566.

The previous prime is 128368523. The next prime is 128368607. The reversal of 128368567 is 765863821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128368567 - 2⁷ = 128368439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128368507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64184283 + 64184284.

It is an arithmetic number, because the mean of its divisors is an integer number (64184284).

Almost surely, 2^128368567 is an apocalyptic number.

128368567 is a deficient number, since it is larger than the sum of its proper divisors (1).

128368567 is an equidigital number, since it uses as much as digits as its factorization.

128368567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The square root of 128368567 is about 11329.9853044918. The cubic root of 128368567 is about 504.4516703025.

The spelling of 128368567 in words is "one hundred twenty-eight million, three hundred sixty-eight thousand, five hundred sixty-seven".