65128027 has 2 divisors, whose sum is σ = 65128028. Its totient is φ = 65128026.

The previous prime is 65128009. The next prime is 65128039. The reversal of 65128027 is 72082156.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65128027 - 2¹⁵ = 65095259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65128027.

It is not a weakly prime, because it can be changed into another prime (65128057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32564013 + 32564014.

It is an arithmetic number, because the mean of its divisors is an integer number (32564014).

Almost surely, 2^65128027 is an apocalyptic number.

65128027 is a deficient number, since it is larger than the sum of its proper divisors (1).

65128027 is an equidigital number, since it uses as much as digits as its factorization.

65128027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 65128027 is about 8070.1937399297. The cubic root of 65128027 is about 402.3363829666.

The spelling of 65128027 in words is "sixty-five million, one hundred twenty-eight thousand, twenty-seven".