65109897 has 6 divisors (see below), whose sum is σ = 94047642. Its totient is φ = 43406592.

The previous prime is 65109893. The next prime is 65109907. The reversal of 65109897 is 79890156.

It can be written as a sum of positive squares in only one way, i.e., 51538041 + 13571856 = 7179^2 + 3684^2 .

It is not a de Polignac number, because 65109897 - 2² = 65109893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65109893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3617208 + ... + 3617225.

It is an arithmetic number, because the mean of its divisors is an integer number (15674607).

Almost surely, 2^65109897 is an apocalyptic number.

It is an amenable number.

65109897 is a deficient number, since it is larger than the sum of its proper divisors (28937745).

65109897 is a wasteful number, since it uses less digits than its factorization.

65109897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7234439 (or 7234436 counting only the distinct ones).

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

The square root of 65109897 is about 8069.0703925545. The cubic root of 65109897 is about 402.2990460682.

The spelling of 65109897 in words is "sixty-five million, one hundred nine thousand, eight hundred ninety-seven".