16985417 has 2 divisors, whose sum is σ = 16985418. Its totient is φ = 16985416.

The previous prime is 16985407. The next prime is 16985429. The reversal of 16985417 is 71458961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15912121 + 1073296 = 3989^2 + 1036^2 .

It is a cyclic number.

It is not a de Polignac number, because 16985417 - 2²² = 12791113 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16985407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8492708 + 8492709.

It is an arithmetic number, because the mean of its divisors is an integer number (8492709).

Almost surely, 2^16985417 is an apocalyptic number.

It is an amenable number.

16985417 is a deficient number, since it is larger than the sum of its proper divisors (1).

16985417 is an equidigital number, since it uses as much as digits as its factorization.

16985417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 41.

The square root of 16985417 is about 4121.3367976908. The cubic root of 16985417 is about 257.0546145041.

The spelling of 16985417 in words is "sixteen million, nine hundred eighty-five thousand, four hundred seventeen".