65140009 has 16 divisors (see below), whose sum is σ = 72745344. Its totient is φ = 57830400.

The previous prime is 65140007. The next prime is 65140027. The reversal of 65140009 is 90004156.

It is a cyclic number.

It is not a de Polignac number, because 65140009 - 2¹ = 65140007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65140001) 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, 129252 + ... + 129754.

It is an arithmetic number, because the mean of its divisors is an integer number (4546584).

Almost surely, 2^65140009 is an apocalyptic number.

It is an amenable number.

65140009 is a deficient number, since it is larger than the sum of its proper divisors (7605335).

65140009 is a wasteful number, since it uses less digits than its factorization.

65140009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 65140009 is about 8070.9360671486. The cubic root of 65140009 is about 402.3610548790.

The spelling of 65140009 in words is "sixty-five million, one hundred forty thousand, nine".