1220088643 has 2 divisors, whose sum is σ = 1220088644. Its totient is φ = 1220088642.

The previous prime is 1220088641. The next prime is 1220088647. The reversal of 1220088643 is 3468800221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220088643 - 2¹ = 1220088641 is a prime.

Together with 1220088641, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1220088599 and 1220088608.

It is not a weakly prime, because it can be changed into another prime (1220088641) 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 as a sum of consecutive naturals, namely, 610044321 + 610044322.

It is an arithmetic number, because the mean of its divisors is an integer number (610044322).

Almost surely, 2^1220088643 is an apocalyptic number.

1220088643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220088643 is an equidigital number, since it uses as much as digits as its factorization.

1220088643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 1220088643 is about 34929.7672909511. The cubic root of 1220088643 is about 1068.5556086699. Note that the first 3 decimals are identical.

Adding to 1220088643 its reverse (3468800221), we get a palindrome (4688888864).

The spelling of 1220088643 in words is "one billion, two hundred twenty million, eighty-eight thousand, six hundred forty-three".