65986189 has 2 divisors, whose sum is σ = 65986190. Its totient is φ = 65986188.

The previous prime is 65986181. The next prime is 65986243. The reversal of 65986189 is 98168956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52809289 + 13176900 = 7267^2 + 3630^2 .

It is a cyclic number.

It is not a de Polignac number, because 65986189 - 2³ = 65986181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65986181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32993094 + 32993095.

It is an arithmetic number, because the mean of its divisors is an integer number (32993095).

Almost surely, 2^65986189 is an apocalyptic number.

It is an amenable number.

65986189 is a deficient number, since it is larger than the sum of its proper divisors (1).

65986189 is an equidigital number, since it uses as much as digits as its factorization.

65986189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 52.

The square root of 65986189 is about 8123.1883518727. The cubic root of 65986189 is about 404.0958114261.

The spelling of 65986189 in words is "sixty-five million, nine hundred eighty-six thousand, one hundred eighty-nine".