65243539 has 2 divisors, whose sum is σ = 65243540. Its totient is φ = 65243538.

The previous prime is 65243527. The next prime is 65243593. The reversal of 65243539 is 93534256.

Together with next prime (65243593) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65243539 - 2⁹ = 65243027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65243498 and 65243507.

It is not a weakly prime, because it can be changed into another prime (65243509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32621769 + 32621770.

It is an arithmetic number, because the mean of its divisors is an integer number (32621770).

Almost surely, 2^65243539 is an apocalyptic number.

65243539 is a deficient number, since it is larger than the sum of its proper divisors (1).

65243539 is an equidigital number, since it uses as much as digits as its factorization.

65243539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 37.

The square root of 65243539 is about 8077.3472749412. The cubic root of 65243539 is about 402.5741056666.

The spelling of 65243539 in words is "sixty-five million, two hundred forty-three thousand, five hundred thirty-nine".