65411993 has 2 divisors, whose sum is σ = 65411994. Its totient is φ = 65411992.

The previous prime is 65411981. The next prime is 65412001. The reversal of 65411993 is 39911456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48330304 + 17081689 = 6952^2 + 4133^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65411993 is a prime.

It is not a weakly prime, because it can be changed into another prime (65411963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32705996 + 32705997.

It is an arithmetic number, because the mean of its divisors is an integer number (32705997).

Almost surely, 2^65411993 is an apocalyptic number.

It is an amenable number.

65411993 is a deficient number, since it is larger than the sum of its proper divisors (1).

65411993 is an equidigital number, since it uses as much as digits as its factorization.

65411993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 38.

The square root of 65411993 is about 8087.7681099300. The cubic root of 65411993 is about 402.9202801097.

The spelling of 65411993 in words is "sixty-five million, four hundred eleven thousand, nine hundred ninety-three".