16998859 has 2 divisors, whose sum is σ = 16998860. Its totient is φ = 16998858.

The previous prime is 16998857. The next prime is 16998869. The reversal of 16998859 is 95889961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16998859 - 2¹ = 16998857 is a prime.

It is a super-3 number, since 3×16998859³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 16998857, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16998857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8499429 + 8499430.

It is an arithmetic number, because the mean of its divisors is an integer number (8499430).

Almost surely, 2^16998859 is an apocalyptic number.

16998859 is a deficient number, since it is larger than the sum of its proper divisors (1).

16998859 is an equidigital number, since it uses as much as digits as its factorization.

16998859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 55.

The square root of 16998859 is about 4122.9672567218. The cubic root of 16998859 is about 257.1224063248.

The spelling of 16998859 in words is "sixteen million, nine hundred ninety-eight thousand, eight hundred fifty-nine".