220747489 has 4 divisors (see below), whose sum is σ = 221457600. Its totient is φ = 220037380.

The previous prime is 220747487. The next prime is 220747511. The reversal of 220747489 is 984747022.

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 220747489 - 2¹ = 220747487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220747487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354589 + ... + 355210.

It is an arithmetic number, because the mean of its divisors is an integer number (55364400).

Almost surely, 2^220747489 is an apocalyptic number.

It is an amenable number.

220747489 is a deficient number, since it is larger than the sum of its proper divisors (710111).

220747489 is an equidigital number, since it uses as much as digits as its factorization.

220747489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710110.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 220747489 is about 14857.5734559853. The cubic root of 220747489 is about 604.3640052904.

The spelling of 220747489 in words is "two hundred twenty million, seven hundred forty-seven thousand, four hundred eighty-nine".