220998889 has 2 divisors, whose sum is σ = 220998890. Its totient is φ = 220998888.

The previous prime is 220998859. The next prime is 220998893. The reversal of 220998889 is 988899022.

220998889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127238400 + 93760489 = 11280^2 + 9683^2 .

It is a cyclic number.

It is not a de Polignac number, because 220998889 - 2⁵ = 220998857 is a prime.

It is not a weakly prime, because it can be changed into another prime (220998809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110499444 + 110499445.

It is an arithmetic number, because the mean of its divisors is an integer number (110499445).

Almost surely, 2^220998889 is an apocalyptic number.

It is an amenable number.

220998889 is a deficient number, since it is larger than the sum of its proper divisors (1).

220998889 is an equidigital number, since it uses as much as digits as its factorization.

220998889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 55.

The square root of 220998889 is about 14866.0313802978. The cubic root of 220998889 is about 604.5933464708.

The spelling of 220998889 in words is "two hundred twenty million, nine hundred ninety-eight thousand, eight hundred eighty-nine".