1220654443 has 2 divisors, whose sum is σ = 1220654444. Its totient is φ = 1220654442.

The previous prime is 1220654429. The next prime is 1220654467. The reversal of 1220654443 is 3444560221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220654443 - 2²⁹ = 683783531 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220654473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610327221 + 610327222.

It is an arithmetic number, because the mean of its divisors is an integer number (610327222).

Almost surely, 2^1220654443 is an apocalyptic number.

1220654443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220654443 is an equidigital number, since it uses as much as digits as its factorization.

1220654443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 1220654443 is about 34937.8654614159. The cubic root of 1220654443 is about 1068.7207593290.

The spelling of 1220654443 in words is "one billion, two hundred twenty million, six hundred fifty-four thousand, four hundred forty-three".