64433217 has 4 divisors (see below), whose sum is σ = 85910960. Its totient is φ = 42955476.

The previous prime is 64433209. The next prime is 64433219. The reversal of 64433217 is 71233446.

64433217 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 64433217 - 2³ = 64433209 is a prime.

It is a super-4 number, since 4×64433217⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64433219) 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, 10738867 + ... + 10738872.

It is an arithmetic number, because the mean of its divisors is an integer number (21477740).

Almost surely, 2^64433217 is an apocalyptic number.

It is an amenable number.

64433217 is a deficient number, since it is larger than the sum of its proper divisors (21477743).

64433217 is a wasteful number, since it uses less digits than its factorization.

64433217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21477742.

The product of its digits is 12096, while the sum is 30.

The square root of 64433217 is about 8027.0303973512. The cubic root of 64433217 is about 400.9005066149.

The spelling of 64433217 in words is "sixty-four million, four hundred thirty-three thousand, two hundred seventeen".