1220329489 has 2 divisors, whose sum is σ = 1220329490. Its totient is φ = 1220329488.

The previous prime is 1220329441. The next prime is 1220329501. The reversal of 1220329489 is 9849230221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1131649600 + 88679889 = 33640^2 + 9417^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220329489 - 2⁷ = 1220329361 is a prime.

It is a super-2 number, since 2×1220329489² = 2978408123446002242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1220329589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610164744 + 610164745.

It is an arithmetic number, because the mean of its divisors is an integer number (610164745).

Almost surely, 2^1220329489 is an apocalyptic number.

It is an amenable number.

1220329489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220329489 is an equidigital number, since it uses as much as digits as its factorization.

1220329489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 1220329489 is about 34933.2146960454. The cubic root of 1220329489 is about 1068.6259151495.

The spelling of 1220329489 in words is "one billion, two hundred twenty million, three hundred twenty-nine thousand, four hundred eighty-nine".