65728189 has 2 divisors, whose sum is σ = 65728190. Its totient is φ = 65728188.

The previous prime is 65728177. The next prime is 65728193. The reversal of 65728189 is 98182756.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61748164 + 3980025 = 7858^2 + 1995^2 .

It is a cyclic number.

It is not a de Polignac number, because 65728189 - 2⁹ = 65727677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65728129) 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, 32864094 + 32864095.

It is an arithmetic number, because the mean of its divisors is an integer number (32864095).

Almost surely, 2^65728189 is an apocalyptic number.

It is an amenable number.

65728189 is a deficient number, since it is larger than the sum of its proper divisors (1).

65728189 is an equidigital number, since it uses as much as digits as its factorization.

65728189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 46.

The square root of 65728189 is about 8107.2923346824. The cubic root of 65728189 is about 403.5684642395.

The spelling of 65728189 in words is "sixty-five million, seven hundred twenty-eight thousand, one hundred eighty-nine".