128941867 has 2 divisors, whose sum is σ = 128941868. Its totient is φ = 128941866.

The previous prime is 128941829. The next prime is 128941873. The reversal of 128941867 is 768149821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128941867 is a prime.

It is not a weakly prime, because it can be changed into another prime (128341867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64470933 + 64470934.

It is an arithmetic number, because the mean of its divisors is an integer number (64470934).

Almost surely, 2^128941867 is an apocalyptic number.

128941867 is a deficient number, since it is larger than the sum of its proper divisors (1).

128941867 is an equidigital number, since it uses as much as digits as its factorization.

128941867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 46.

The square root of 128941867 is about 11355.2572405912. The cubic root of 128941867 is about 505.2015233345.

The spelling of 128941867 in words is "one hundred twenty-eight million, nine hundred forty-one thousand, eight hundred sixty-seven".