65365813 has 2 divisors, whose sum is σ = 65365814. Its totient is φ = 65365812.

The previous prime is 65365759. The next prime is 65365829. The reversal of 65365813 is 31856356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65318724 + 47089 = 8082^2 + 217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65365813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65365843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32682906 + 32682907.

It is an arithmetic number, because the mean of its divisors is an integer number (32682907).

Almost surely, 2^65365813 is an apocalyptic number.

It is an amenable number.

65365813 is a deficient number, since it is larger than the sum of its proper divisors (1).

65365813 is an equidigital number, since it uses as much as digits as its factorization.

65365813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 37.

The square root of 65365813 is about 8084.9126773268. The cubic root of 65365813 is about 402.8254389950.

It can be divided in two parts, 653 and 65813, that added together give a palindrome (66466).

The spelling of 65365813 in words is "sixty-five million, three hundred sixty-five thousand, eight hundred thirteen".