64709223 has 8 divisors (see below), whose sum is σ = 86637936. Its totient is φ = 42960000.

The previous prime is 64709219. The next prime is 64709243. The reversal of 64709223 is 32290746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64709223 - 2² = 64709219 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64709243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44028 + ... + 45473.

It is an arithmetic number, because the mean of its divisors is an integer number (10829742).

Almost surely, 2^64709223 is an apocalyptic number.

64709223 is a deficient number, since it is larger than the sum of its proper divisors (21928713).

64709223 is a wasteful number, since it uses less digits than its factorization.

64709223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89745.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 64709223 is about 8044.2043111796. The cubic root of 64709223 is about 401.4721234019.

Adding to 64709223 its reverse (32290746), we get a palindrome (96999969).

The spelling of 64709223 in words is "sixty-four million, seven hundred nine thousand, two hundred twenty-three".