1220473589 has 4 divisors (see below), whose sum is σ = 1221136224. Its totient is φ = 1219810956.

The previous prime is 1220473577. The next prime is 1220473603. The reversal of 1220473589 is 9853740221.

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 a cyclic number.

It is not a de Polignac number, because 1220473589 - 2²⁰ = 1219425013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220473549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328547 + ... + 332240.

It is an arithmetic number, because the mean of its divisors is an integer number (305284056).

Almost surely, 2^1220473589 is an apocalyptic number.

It is an amenable number.

1220473589 is a deficient number, since it is larger than the sum of its proper divisors (662635).

1220473589 is an equidigital number, since it uses as much as digits as its factorization.

1220473589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662634.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 1220473589 is about 34935.2771421668. The cubic root of 1220473589 is about 1068.6679756299.

The spelling of 1220473589 in words is "one billion, two hundred twenty million, four hundred seventy-three thousand, five hundred eighty-nine".