65105917 has 2 divisors, whose sum is σ = 65105918. Its totient is φ = 65105916.

The previous prime is 65105897. The next prime is 65105923. The reversal of 65105917 is 71950156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64224196 + 881721 = 8014^2 + 939^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65105917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65105927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32552958 + 32552959.

It is an arithmetic number, because the mean of its divisors is an integer number (32552959).

Almost surely, 2^65105917 is an apocalyptic number.

It is an amenable number.

65105917 is a deficient number, since it is larger than the sum of its proper divisors (1).

65105917 is an equidigital number, since it uses as much as digits as its factorization.

65105917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 65105917 is about 8068.8237680594. The cubic root of 65105917 is about 402.2908487336.

The spelling of 65105917 in words is "sixty-five million, one hundred five thousand, nine hundred seventeen".