64680013 has 4 divisors (see below), whose sum is σ = 64781248. Its totient is φ = 64578780.

The previous prime is 64679999. The next prime is 64680017. The reversal of 64680013 is 31008646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64680013 - 2⁹ = 64679501 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 (64680017) 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, 49653 + ... + 50938.

It is an arithmetic number, because the mean of its divisors is an integer number (16195312).

Almost surely, 2^64680013 is an apocalyptic number.

It is an amenable number.

64680013 is a deficient number, since it is larger than the sum of its proper divisors (101235).

64680013 is a wasteful number, since it uses less digits than its factorization.

64680013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101234.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 64680013 is about 8042.3885133709. The cubic root of 64680013 is about 401.4117056069.

Adding to 64680013 its reverse (31008646), we get a palindrome (95688659).

The spelling of 64680013 in words is "sixty-four million, six hundred eighty thousand, thirteen".