65128967 has 2 divisors, whose sum is σ = 65128968. Its totient is φ = 65128966.

The previous prime is 65128963. The next prime is 65128969. The reversal of 65128967 is 76982156.

65128967 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65128967 - 2² = 65128963 is a prime.

Together with 65128969, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65128963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32564483 + 32564484.

It is an arithmetic number, because the mean of its divisors is an integer number (32564484).

Almost surely, 2^65128967 is an apocalyptic number.

65128967 is a deficient number, since it is larger than the sum of its proper divisors (1).

65128967 is an equidigital number, since it uses as much as digits as its factorization.

65128967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 65128967 is about 8070.2519787179. The cubic root of 65128967 is about 402.3383186124.

The spelling of 65128967 in words is "sixty-five million, one hundred twenty-eight thousand, nine hundred sixty-seven".