65538497 has 2 divisors, whose sum is σ = 65538498. Its totient is φ = 65538496.

The previous prime is 65538481. The next prime is 65538503. The reversal of 65538497 is 79483556.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60855601 + 4682896 = 7801^2 + 2164^2 .

It is a cyclic number.

It is not a de Polignac number, because 65538497 - 2⁴ = 65538481 is a prime.

It is not a weakly prime, because it can be changed into another prime (65538427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32769248 + 32769249.

It is an arithmetic number, because the mean of its divisors is an integer number (32769249).

Almost surely, 2^65538497 is an apocalyptic number.

It is an amenable number.

65538497 is a deficient number, since it is larger than the sum of its proper divisors (1).

65538497 is an equidigital number, since it uses as much as digits as its factorization.

65538497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 47.

The square root of 65538497 is about 8095.5850313612. The cubic root of 65538497 is about 403.1798563812.

The spelling of 65538497 in words is "sixty-five million, five hundred thirty-eight thousand, four hundred ninety-seven".