65043569 has 2 divisors, whose sum is σ = 65043570. Its totient is φ = 65043568.

The previous prime is 65043541. The next prime is 65043571. The reversal of 65043569 is 96534056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59089969 + 5953600 = 7687^2 + 2440^2 .

It is a cyclic number.

It is not a de Polignac number, because 65043569 - 2¹² = 65039473 is a prime.

It is a super-2 number, since 2×65043569² = 8461331736515522, which contains 22 as substring.

Together with 65043571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65043529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32521784 + 32521785.

It is an arithmetic number, because the mean of its divisors is an integer number (32521785).

Almost surely, 2^65043569 is an apocalyptic number.

It is an amenable number.

65043569 is a deficient number, since it is larger than the sum of its proper divisors (1).

65043569 is an equidigital number, since it uses as much as digits as its factorization.

65043569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 65043569 is about 8064.9593303376. The cubic root of 65043569 is about 402.1623911793.

The spelling of 65043569 in words is "sixty-five million, forty-three thousand, five hundred sixty-nine".