17221489 has 2 divisors, whose sum is σ = 17221490. Its totient is φ = 17221488.

The previous prime is 17221483. The next prime is 17221507. The reversal of 17221489 is 98412271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15800625 + 1420864 = 3975^2 + 1192^2 .

It is a cyclic number.

It is not a de Polignac number, because 17221489 - 2²³ = 8832881 is a prime.

It is not a weakly prime, because it can be changed into another prime (17221483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8610744 + 8610745.

It is an arithmetic number, because the mean of its divisors is an integer number (8610745).

Almost surely, 2^17221489 is an apocalyptic number.

It is an amenable number.

17221489 is a deficient number, since it is larger than the sum of its proper divisors (1).

17221489 is an equidigital number, since it uses as much as digits as its factorization.

17221489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 34.

The square root of 17221489 is about 4149.8781909834. The cubic root of 17221489 is about 258.2400316088.

The spelling of 17221489 in words is "seventeen million, two hundred twenty-one thousand, four hundred eighty-nine".