1220288673 has 4 divisors (see below), whose sum is σ = 1627051568. Its totient is φ = 813525780.

The previous prime is 1220288653. The next prime is 1220288677. The reversal of 1220288673 is 3768820221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1220288673 - 2¹² = 1220284577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220288677) 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 in 3 ways as a sum of consecutive naturals, for example, 203381443 + ... + 203381448.

It is an arithmetic number, because the mean of its divisors is an integer number (406762892).

Almost surely, 2^1220288673 is an apocalyptic number.

It is an amenable number.

1220288673 is a deficient number, since it is larger than the sum of its proper divisors (406762895).

1220288673 is an equidigital number, since it uses as much as digits as its factorization.

1220288673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406762894.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 1220288673 is about 34932.6304907031. The cubic root of 1220288673 is about 1068.6140010115.

The spelling of 1220288673 in words is "one billion, two hundred twenty million, two hundred eighty-eight thousand, six hundred seventy-three".