16916489 has 2 divisors, whose sum is σ = 16916490. Its totient is φ = 16916488.

The previous prime is 16916467. The next prime is 16916491. The reversal of 16916489 is 98461961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14137600 + 2778889 = 3760^2 + 1667^2 .

It is a cyclic number.

It is not a de Polignac number, because 16916489 - 2⁸ = 16916233 is a prime.

Together with 16916491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16916429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8458244 + 8458245.

It is an arithmetic number, because the mean of its divisors is an integer number (8458245).

Almost surely, 2^16916489 is an apocalyptic number.

It is an amenable number.

16916489 is a deficient number, since it is larger than the sum of its proper divisors (1).

16916489 is an equidigital number, since it uses as much as digits as its factorization.

16916489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 44.

The square root of 16916489 is about 4112.9659614444. The cubic root of 16916489 is about 256.7064279399.

The spelling of 16916489 in words is "sixteen million, nine hundred sixteen thousand, four hundred eighty-nine".