647311223 has 8 divisors (see below), whose sum is σ = 697817568. Its totient is φ = 596906784.

The previous prime is 647311219. The next prime is 647311237. The reversal of 647311223 is 322113746.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 647311223 - 2² = 647311219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647311123) 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, 12011 + ... + 37932.

It is an arithmetic number, because the mean of its divisors is an integer number (87227196).

Almost surely, 2^647311223 is an apocalyptic number.

647311223 is a deficient number, since it is larger than the sum of its proper divisors (50506345).

647311223 is a wasteful number, since it uses less digits than its factorization.

647311223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50953.

The product of its digits is 6048, while the sum is 29.

The square root of 647311223 is about 25442.3116677711. The cubic root of 647311223 is about 865.0430321515.

Adding to 647311223 its reverse (322113746), we get a palindrome (969424969).

The spelling of 647311223 in words is "six hundred forty-seven million, three hundred eleven thousand, two hundred twenty-three".