65613013 has 8 divisors (see below), whose sum is σ = 69576408. Its totient is φ = 61661184.

The previous prime is 65613001. The next prime is 65613049. The reversal of 65613013 is 31031656.

It can be written as a sum of positive squares in 4 ways, for example, as 2537649 + 63075364 = 1593^2 + 7942^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65613013 - 2¹³ = 65604821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65613083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10645 + ... + 15637.

It is an arithmetic number, because the mean of its divisors is an integer number (8697051).

Almost surely, 2^65613013 is an apocalyptic number.

It is an amenable number.

65613013 is a deficient number, since it is larger than the sum of its proper divisors (3963395).

65613013 is a wasteful number, since it uses less digits than its factorization.

65613013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5783.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 65613013 is about 8100.1859855191. The cubic root of 65613013 is about 403.3326010657.

Adding to 65613013 its reverse (31031656), we get a palindrome (96644669).

The spelling of 65613013 in words is "sixty-five million, six hundred thirteen thousand, thirteen".