65513009 has 4 divisors (see below), whose sum is σ = 65529204. Its totient is φ = 65496816.

The previous prime is 65513003. The next prime is 65513023. The reversal of 65513009 is 90031556.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 41473600 + 24039409 = 6440^2 + 4903^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65513009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65513003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3719 + ... + 12035.

It is an arithmetic number, because the mean of its divisors is an integer number (16382301).

Almost surely, 2^65513009 is an apocalyptic number.

It is an amenable number.

65513009 is a deficient number, since it is larger than the sum of its proper divisors (16195).

65513009 is an equidigital number, since it uses as much as digits as its factorization.

65513009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16194.

The product of its (nonzero) digits is 4050, while the sum is 29.

The square root of 65513009 is about 8094.0106869215. The cubic root of 65513009 is about 403.1275838947.

The spelling of 65513009 in words is "sixty-five million, five hundred thirteen thousand, nine".