65916593 has 2 divisors, whose sum is σ = 65916594. Its totient is φ = 65916592.

The previous prime is 65916589. The next prime is 65916637. The reversal of 65916593 is 39561956.

It is an a-pointer prime, because the next prime (65916637) can be obtained adding 65916593 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59706529 + 6210064 = 7727^2 + 2492^2 .

It is a cyclic number.

It is not a de Polignac number, because 65916593 - 2² = 65916589 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (65916523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32958296 + 32958297.

It is an arithmetic number, because the mean of its divisors is an integer number (32958297).

Almost surely, 2^65916593 is an apocalyptic number.

It is an amenable number.

65916593 is a deficient number, since it is larger than the sum of its proper divisors (1).

65916593 is an equidigital number, since it uses as much as digits as its factorization.

65916593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 218700, while the sum is 44.

The square root of 65916593 is about 8118.9034358095. The cubic root of 65916593 is about 403.9536940849.

Multiplying 65916593 by its sum of digits (44), we get a palindrome (2900330092).

The spelling of 65916593 in words is "sixty-five million, nine hundred sixteen thousand, five hundred ninety-three".