64748513 has 4 divisors (see below), whose sum is σ = 64819140. Its totient is φ = 64677888.

The previous prime is 64748501. The next prime is 64748531. The reversal of 64748513 is 31584746.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36626704 + 28121809 = 6052^2 + 5303^2 .

It is a cyclic number.

It is not a de Polignac number, because 64748513 - 2¹⁰ = 64747489 is a prime.

It is a super-2 number, since 2×64748513² = 8384739871422338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64748533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33920 + ... + 35777.

It is an arithmetic number, because the mean of its divisors is an integer number (16204785).

Almost surely, 2^64748513 is an apocalyptic number.

It is an amenable number.

64748513 is a deficient number, since it is larger than the sum of its proper divisors (70627).

64748513 is an equidigital number, since it uses as much as digits as its factorization.

64748513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70626.

The product of its digits is 80640, while the sum is 38.

The square root of 64748513 is about 8046.6460715008. The cubic root of 64748513 is about 401.5533619414.

The spelling of 64748513 in words is "sixty-four million, seven hundred forty-eight thousand, five hundred thirteen".