648222647 has 8 divisors (see below), whose sum is σ = 667242000. Its totient is φ = 629282304.

The previous prime is 648222643. The next prime is 648222649. The reversal of 648222647 is 746222846.

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 648222647 - 2² = 648222643 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 (648222643) 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 7 ways as a sum of consecutive naturals, for example, 2897 + ... + 36122.

It is an arithmetic number, because the mean of its divisors is an integer number (83405250).

Almost surely, 2^648222647 is an apocalyptic number.

648222647 is a deficient number, since it is larger than the sum of its proper divisors (19019353).

648222647 is a wasteful number, since it uses less digits than its factorization.

648222647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39505.

The product of its digits is 258048, while the sum is 41.

The square root of 648222647 is about 25460.2169472297. The cubic root of 648222647 is about 865.4488396443.

The spelling of 648222647 in words is "six hundred forty-eight million, two hundred twenty-two thousand, six hundred forty-seven".