64523413 has 4 divisors (see below), whose sum is σ = 64603980. Its totient is φ = 64442848.

The previous prime is 64523401. The next prime is 64523443. The reversal of 64523413 is 31432546.

64523413 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 an emirpimes, since its reverse is a distinct semiprime: 31432546 = 2 ⋅15716273.

It can be written as a sum of positive squares in 2 ways, for example, as 50438404 + 14085009 = 7102^2 + 3753^2 .

It is a cyclic number.

It is not a de Polignac number, because 64523413 - 2⁹ = 64522901 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 (64523443) 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, 39070 + ... + 40687.

It is an arithmetic number, because the mean of its divisors is an integer number (16150995).

Almost surely, 2^64523413 is an apocalyptic number.

It is an amenable number.

64523413 is a deficient number, since it is larger than the sum of its proper divisors (80567).

64523413 is an equidigital number, since it uses as much as digits as its factorization.

64523413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80566.

The product of its digits is 8640, while the sum is 28.

The square root of 64523413 is about 8032.6466995630. The cubic root of 64523413 is about 401.0874845142.

Adding to 64523413 its reverse (31432546), we get a palindrome (95955959).

The spelling of 64523413 in words is "sixty-four million, five hundred twenty-three thousand, four hundred thirteen".