65311613 has 2 divisors, whose sum is σ = 65311614. Its totient is φ = 65311612.

The previous prime is 65311583. The next prime is 65311619. The reversal of 65311613 is 31611356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60637369 + 4674244 = 7787^2 + 2162^2 .

It is a cyclic number.

It is not a de Polignac number, because 65311613 - 2⁸ = 65311357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65311619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32655806 + 32655807.

It is an arithmetic number, because the mean of its divisors is an integer number (32655807).

Almost surely, 2^65311613 is an apocalyptic number.

It is an amenable number.

65311613 is a deficient number, since it is larger than the sum of its proper divisors (1).

65311613 is an equidigital number, since it uses as much as digits as its factorization.

65311613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 26.

The square root of 65311613 is about 8081.5600597904. The cubic root of 65311613 is about 402.7140699929.

Adding to 65311613 its reverse (31611356), we get a palindrome (96922969).

The spelling of 65311613 in words is "sixty-five million, three hundred eleven thousand, six hundred thirteen".