64004819 has 4 divisors (see below), whose sum is σ = 64161720. Its totient is φ = 63847920.

The previous prime is 64004803. The next prime is 64004821. The reversal of 64004819 is 91840046.

64004819 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: 91840046 = 2 ⋅45920023.

It is a cyclic number.

It is not a de Polignac number, because 64004819 - 2⁴ = 64004803 is a prime.

It is a super-2 number, since 2×64004819² = 8193233710445522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64004419) 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, 77837 + ... + 78654.

It is an arithmetic number, because the mean of its divisors is an integer number (16040430).

Almost surely, 2^64004819 is an apocalyptic number.

64004819 is a deficient number, since it is larger than the sum of its proper divisors (156901).

64004819 is a wasteful number, since it uses less digits than its factorization.

64004819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156900.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 64004819 is about 8000.3011818306. The cubic root of 64004819 is about 400.0100393314.

The spelling of 64004819 in words is "sixty-four million, four thousand, eight hundred nineteen".