65897109 has 12 divisors (see below), whose sum is σ = 95440800. Its totient is φ = 43813224.

The previous prime is 65897089. The next prime is 65897119. The reversal of 65897109 is 90179856.

It is not a de Polignac number, because 65897109 - 2¹¹ = 65895061 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65897119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6249 + ... + 13070.

It is an arithmetic number, because the mean of its divisors is an integer number (7953400).

Almost surely, 2^65897109 is an apocalyptic number.

It is an amenable number.

65897109 is a deficient number, since it is larger than the sum of its proper divisors (29543691).

65897109 is a wasteful number, since it uses less digits than its factorization.

65897109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19704 (or 19701 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 65897109 is about 8117.7034313899. The cubic root of 65897109 is about 403.9138891889.

The spelling of 65897109 in words is "sixty-five million, eight hundred ninety-seven thousand, one hundred nine".