128464667 has 2 divisors, whose sum is σ = 128464668. Its totient is φ = 128464666.

The previous prime is 128464621. The next prime is 128464669. The reversal of 128464667 is 766464821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128464667 - 2⁸ = 128464411 is a prime.

Together with 128464669, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128464669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64232333 + 64232334.

It is an arithmetic number, because the mean of its divisors is an integer number (64232334).

Almost surely, 2^128464667 is an apocalyptic number.

128464667 is a deficient number, since it is larger than the sum of its proper divisors (1).

128464667 is an equidigital number, since it uses as much as digits as its factorization.

128464667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 44.

The square root of 128464667 is about 11334.2254697884. The cubic root of 128464667 is about 504.5775207201.

The spelling of 128464667 in words is "one hundred twenty-eight million, four hundred sixty-four thousand, six hundred sixty-seven".