1220344403 has 2 divisors, whose sum is σ = 1220344404. Its totient is φ = 1220344402.

The previous prime is 1220344399. The next prime is 1220344421. The reversal of 1220344403 is 3044430221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220344403 - 2² = 1220344399 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220344423) 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, 610172201 + 610172202.

It is an arithmetic number, because the mean of its divisors is an integer number (610172202).

Almost surely, 2^1220344403 is an apocalyptic number.

1220344403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220344403 is an equidigital number, since it uses as much as digits as its factorization.

1220344403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1220344403 is about 34933.4281598586. The cubic root of 1220344403 is about 1068.6302684607.

Adding to 1220344403 its reverse (3044430221), we get a palindrome (4264774624).

The spelling of 1220344403 in words is "one billion, two hundred twenty million, three hundred forty-four thousand, four hundred three".