128208967 has 2 divisors, whose sum is σ = 128208968. Its totient is φ = 128208966.

The previous prime is 128208943. The next prime is 128208973. The reversal of 128208967 is 769802821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128208967 - 2¹¹ = 128206919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128208937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64104483 + 64104484.

It is an arithmetic number, because the mean of its divisors is an integer number (64104484).

Almost surely, 2^128208967 is an apocalyptic number.

128208967 is a deficient number, since it is larger than the sum of its proper divisors (1).

128208967 is an equidigital number, since it uses as much as digits as its factorization.

128208967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 128208967 is about 11322.9398567686. The cubic root of 128208967 is about 504.2425228515.

The spelling of 128208967 in words is "one hundred twenty-eight million, two hundred eight thousand, nine hundred sixty-seven".