16220489 has 2 divisors, whose sum is σ = 16220490. Its totient is φ = 16220488.

The previous prime is 16220459. The next prime is 16220513. The reversal of 16220489 is 98402261.

16220489 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., 10291264 + 5929225 = 3208^2 + 2435^2 .

It is a cyclic number.

It is not a de Polignac number, because 16220489 - 2⁸ = 16220233 is a prime.

It is not a weakly prime, because it can be changed into another prime (16220419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8110244 + 8110245.

It is an arithmetic number, because the mean of its divisors is an integer number (8110245).

Almost surely, 2^16220489 is an apocalyptic number.

It is an amenable number.

16220489 is a deficient number, since it is larger than the sum of its proper divisors (1).

16220489 is an equidigital number, since it uses as much as digits as its factorization.

16220489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 16220489 is about 4027.4668217131. The cubic root of 16220489 is about 253.1364280569.

The spelling of 16220489 in words is "sixteen million, two hundred twenty thousand, four hundred eighty-nine".