64471313 has 4 divisors (see below), whose sum is σ = 67864560. Its totient is φ = 61078068.

The previous prime is 64471283. The next prime is 64471331. The reversal of 64471313 is 31317446.

64471313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31317446 = 2 ⋅15658723.

It is a cyclic number.

It is not a de Polignac number, because 64471313 - 2¹² = 64467217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64471513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1696595 + ... + 1696632.

It is an arithmetic number, because the mean of its divisors is an integer number (16966140).

Almost surely, 2^64471313 is an apocalyptic number.

It is an amenable number.

64471313 is a deficient number, since it is larger than the sum of its proper divisors (3393247).

64471313 is a wasteful number, since it uses less digits than its factorization.

64471313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3393246.

The product of its digits is 6048, while the sum is 29.

The square root of 64471313 is about 8029.4030288683. The cubic root of 64471313 is about 400.9795015672.

Adding to 64471313 its reverse (31317446), we get a palindrome (95788759).

The spelling of 64471313 in words is "sixty-four million, four hundred seventy-one thousand, three hundred thirteen".