16630489 has 2 divisors, whose sum is σ = 16630490. Its totient is φ = 16630488.

The previous prime is 16630487. The next prime is 16630513. The reversal of 16630489 is 98403661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16540489 + 90000 = 4067^2 + 300^2 .

It is an emirp because it is prime and its reverse (98403661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16630489 - 2¹ = 16630487 is a prime.

Together with 16630487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16630487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8315244 + 8315245.

It is an arithmetic number, because the mean of its divisors is an integer number (8315245).

Almost surely, 2^16630489 is an apocalyptic number.

It is an amenable number.

16630489 is a deficient number, since it is larger than the sum of its proper divisors (1).

16630489 is an equidigital number, since it uses as much as digits as its factorization.

16630489 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 16630489 is about 4078.0496563921. The cubic root of 16630489 is about 255.2515216598.

The spelling of 16630489 in words is "sixteen million, six hundred thirty thousand, four hundred eighty-nine".