128662967 has 2 divisors, whose sum is σ = 128662968. Its totient is φ = 128662966.

The previous prime is 128662957. The next prime is 128662999. The reversal of 128662967 is 769266821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128662967 - 2⁴ = 128662951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128662907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64331483 + 64331484.

It is an arithmetic number, because the mean of its divisors is an integer number (64331484).

Almost surely, 2^128662967 is an apocalyptic number.

128662967 is a deficient number, since it is larger than the sum of its proper divisors (1).

128662967 is an equidigital number, since it uses as much as digits as its factorization.

128662967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 128662967 is about 11342.9699373665. The cubic root of 128662967 is about 504.8370117415.

The spelling of 128662967 in words is "one hundred twenty-eight million, six hundred sixty-two thousand, nine hundred sixty-seven".