64320613 has 4 divisors (see below), whose sum is σ = 73509280. Its totient is φ = 55131948.

The previous prime is 64320611. The next prime is 64320631. The reversal of 64320613 is 31602346.

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 64320613 - 2¹ = 64320611 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 (64320611) 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, 4594323 + ... + 4594336.

It is an arithmetic number, because the mean of its divisors is an integer number (18377320).

Almost surely, 2^64320613 is an apocalyptic number.

It is an amenable number.

64320613 is a deficient number, since it is larger than the sum of its proper divisors (9188667).

64320613 is an equidigital number, since it uses as much as digits as its factorization.

64320613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9188666.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 64320613 is about 8020.0132792908. The cubic root of 64320613 is about 400.6668314717. Note that the first 3 decimals are identical.

Adding to 64320613 its reverse (31602346), we get a palindrome (95922959).

The spelling of 64320613 in words is "sixty-four million, three hundred twenty thousand, six hundred thirteen".