65091005 has 16 divisors (see below), whose sum is σ = 91169280. Its totient is φ = 43683072.

The previous prime is 65091001. The next prime is 65091043. The reversal of 65091005 is 50019056.

It is a cyclic number.

It is not a de Polignac number, because 65091005 - 2² = 65091001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65091001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18140 + ... + 21429.

It is an arithmetic number, because the mean of its divisors is an integer number (5698080).

Almost surely, 2^65091005 is an apocalyptic number.

It is an amenable number.

65091005 is a deficient number, since it is larger than the sum of its proper divisors (26078275).

65091005 is a wasteful number, since it uses less digits than its factorization.

65091005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39628.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 65091005 is about 8067.8996647207. The cubic root of 65091005 is about 402.2601325332.

The spelling of 65091005 in words is "sixty-five million, ninety-one thousand, five".