64319869 has 4 divisors (see below), whose sum is σ = 64346400. Its totient is φ = 64293340.

The previous prime is 64319867. The next prime is 64319881. The reversal of 64319869 is 96891346.

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.

It is a cyclic number.

It is not a de Polignac number, because 64319869 - 2¹ = 64319867 is a prime.

It is a super-2 number, since 2×64319869² = 8274091096354322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64319861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9217 + ... + 14614.

It is an arithmetic number, because the mean of its divisors is an integer number (16086600).

Almost surely, 2^64319869 is an apocalyptic number.

It is an amenable number.

64319869 is a deficient number, since it is larger than the sum of its proper divisors (26531).

64319869 is a wasteful number, since it uses less digits than its factorization.

64319869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26530.

The product of its digits is 279936, while the sum is 46.

The square root of 64319869 is about 8019.9668951935. The cubic root of 64319869 is about 400.6652866208.

The spelling of 64319869 in words is "sixty-four million, three hundred nineteen thousand, eight hundred sixty-nine".