65420189 has 2 divisors, whose sum is σ = 65420190. Its totient is φ = 65420188.

The previous prime is 65420183. The next prime is 65420227. The reversal of 65420189 is 98102456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55995289 + 9424900 = 7483^2 + 3070^2 .

It is a cyclic number.

It is not a de Polignac number, because 65420189 - 2²⁰ = 64371613 is a prime.

It is a super-2 number, since 2×65420189² = 8559602257591442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65420183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32710094 + 32710095.

It is an arithmetic number, because the mean of its divisors is an integer number (32710095).

Almost surely, 2^65420189 is an apocalyptic number.

It is an amenable number.

65420189 is a deficient number, since it is larger than the sum of its proper divisors (1).

65420189 is an equidigital number, since it uses as much as digits as its factorization.

65420189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 65420189 is about 8088.2747851442. The cubic root of 65420189 is about 402.9371077919.

The spelling of 65420189 in words is "sixty-five million, four hundred twenty thousand, one hundred eighty-nine".