65220289 has 2 divisors, whose sum is σ = 65220290. Its totient is φ = 65220288.

The previous prime is 65220277. The next prime is 65220319. The reversal of 65220289 is 98202256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56130064 + 9090225 = 7492^2 + 3015^2 .

It is a cyclic number.

It is not a de Polignac number, because 65220289 - 2⁵ = 65220257 is a prime.

It is not a weakly prime, because it can be changed into another prime (65220229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32610144 + 32610145.

It is an arithmetic number, because the mean of its divisors is an integer number (32610145).

Almost surely, 2^65220289 is an apocalyptic number.

It is an amenable number.

65220289 is a deficient number, since it is larger than the sum of its proper divisors (1).

65220289 is an equidigital number, since it uses as much as digits as its factorization.

65220289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 65220289 is about 8075.9079365728. The cubic root of 65220289 is about 402.5262799348.

The spelling of 65220289 in words is "sixty-five million, two hundred twenty thousand, two hundred eighty-nine".