65306389 has 2 divisors, whose sum is σ = 65306390. Its totient is φ = 65306388.

The previous prime is 65306387. The next prime is 65306419. The reversal of 65306389 is 98360356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43758225 + 21548164 = 6615^2 + 4642^2 .

It is a cyclic number.

It is not a de Polignac number, because 65306389 - 2¹ = 65306387 is a prime.

Together with 65306387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65306387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32653194 + 32653195.

It is an arithmetic number, because the mean of its divisors is an integer number (32653195).

Almost surely, 2^65306389 is an apocalyptic number.

It is an amenable number.

65306389 is a deficient number, since it is larger than the sum of its proper divisors (1).

65306389 is an equidigital number, since it uses as much as digits as its factorization.

65306389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 65306389 is about 8081.2368484038. The cubic root of 65306389 is about 402.7033325742.

The spelling of 65306389 in words is "sixty-five million, three hundred six thousand, three hundred eighty-nine".