220309489 has 2 divisors, whose sum is σ = 220309490. Its totient is φ = 220309488.

The previous prime is 220309487. The next prime is 220309493. The reversal of 220309489 is 984903022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220017889 + 291600 = 14833^2 + 540^2 .

It is a cyclic number.

It is not a de Polignac number, because 220309489 - 2¹ = 220309487 is a prime.

It is a super-2 number, since 2×220309489² = 97072541886882242, which contains 22 as substring.

Together with 220309487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (220309487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110154744 + 110154745.

It is an arithmetic number, because the mean of its divisors is an integer number (110154745).

Almost surely, 2^220309489 is an apocalyptic number.

It is an amenable number.

220309489 is a deficient number, since it is larger than the sum of its proper divisors (1).

220309489 is an equidigital number, since it uses as much as digits as its factorization.

220309489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 220309489 is about 14842.8261796735. The cubic root of 220309489 is about 603.9640208163.

The spelling of 220309489 in words is "two hundred twenty million, three hundred nine thousand, four hundred eighty-nine".