64235819 has 4 divisors (see below), whose sum is σ = 64524096. Its totient is φ = 63947544.

The previous prime is 64235777. The next prime is 64235833. The reversal of 64235819 is 91853246.

It is a happy number.

64235819 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.

It is a cyclic number.

It is not a de Polignac number, because 64235819 - 2²⁴ = 47458603 is a prime.

It is a super-2 number, since 2×64235819² = 8252480885201522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64235879) 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, 143804 + ... + 144249.

It is an arithmetic number, because the mean of its divisors is an integer number (16131024).

Almost surely, 2^64235819 is an apocalyptic number.

64235819 is a deficient number, since it is larger than the sum of its proper divisors (288277).

64235819 is a wasteful number, since it uses less digits than its factorization.

64235819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288276.

The product of its digits is 51840, while the sum is 38.

The square root of 64235819 is about 8014.7251356488. The cubic root of 64235819 is about 400.4906874019.

The spelling of 64235819 in words is "sixty-four million, two hundred thirty-five thousand, eight hundred nineteen".