65165197 has 2 divisors, whose sum is σ = 65165198. Its totient is φ = 65165196.

The previous prime is 65165173. The next prime is 65165227. The reversal of 65165197 is 79156156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43903876 + 21261321 = 6626^2 + 4611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65165197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65165297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32582598 + 32582599.

It is an arithmetic number, because the mean of its divisors is an integer number (32582599).

Almost surely, 2^65165197 is an apocalyptic number.

It is an amenable number.

65165197 is a deficient number, since it is larger than the sum of its proper divisors (1).

65165197 is an equidigital number, since it uses as much as digits as its factorization.

65165197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 40.

The square root of 65165197 is about 8072.4963301323. The cubic root of 65165197 is about 402.4129091563.

The spelling of 65165197 in words is "sixty-five million, one hundred sixty-five thousand, one hundred ninety-seven".