16906489 has 2 divisors, whose sum is σ = 16906490. Its totient is φ = 16906488.

The previous prime is 16906481. The next prime is 16906537. The reversal of 16906489 is 98460961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13446889 + 3459600 = 3667^2 + 1860^2 .

It is a cyclic number.

It is not a de Polignac number, because 16906489 - 2³ = 16906481 is a prime.

It is not a weakly prime, because it can be changed into another prime (16906481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8453244 + 8453245.

It is an arithmetic number, because the mean of its divisors is an integer number (8453245).

Almost surely, 2^16906489 is an apocalyptic number.

It is an amenable number.

16906489 is a deficient number, since it is larger than the sum of its proper divisors (1).

16906489 is an equidigital number, since it uses as much as digits as its factorization.

16906489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 16906489 is about 4111.7501140026. The cubic root of 16906489 is about 256.6558348908.

The spelling of 16906489 in words is "sixteen million, nine hundred six thousand, four hundred eighty-nine".