1220438353 has 2 divisors, whose sum is σ = 1220438354. Its totient is φ = 1220438352.

The previous prime is 1220438321. The next prime is 1220438369. The reversal of 1220438353 is 3538340221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 709316689 + 511121664 = 26633^2 + 22608^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220438353 - 2⁵ = 1220438321 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220438393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610219176 + 610219177.

It is an arithmetic number, because the mean of its divisors is an integer number (610219177).

Almost surely, 2^1220438353 is an apocalyptic number.

It is an amenable number.

1220438353 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220438353 is an equidigital number, since it uses as much as digits as its factorization.

1220438353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 1220438353 is about 34934.7728345269. The cubic root of 1220438353 is about 1068.6576911120.

Adding to 1220438353 its reverse (3538340221), we get a palindrome (4758778574).

The spelling of 1220438353 in words is "one billion, two hundred twenty million, four hundred thirty-eight thousand, three hundred fifty-three".