220959647 has 2 divisors, whose sum is σ = 220959648. Its totient is φ = 220959646.

The previous prime is 220959637. The next prime is 220959667. The reversal of 220959647 is 746959022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220959647 - 2¹⁰ = 220958623 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 220959598 and 220959607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220959637) 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 as a sum of consecutive naturals, namely, 110479823 + 110479824.

It is an arithmetic number, because the mean of its divisors is an integer number (110479824).

Almost surely, 2^220959647 is an apocalyptic number.

220959647 is a deficient number, since it is larger than the sum of its proper divisors (1).

220959647 is an equidigital number, since it uses as much as digits as its factorization.

220959647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 220959647 is about 14864.7114670955. The cubic root of 220959647 is about 604.5575591770.

The spelling of 220959647 in words is "two hundred twenty million, nine hundred fifty-nine thousand, six hundred forty-seven".