16999289 has 4 divisors (see below), whose sum is σ = 17361024. Its totient is φ = 16637556.

The previous prime is 16999259. The next prime is 16999351. The reversal of 16999289 is 98299961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98299961 = 223 ⋅440807.

It is a cyclic number.

It is not a de Polignac number, because 16999289 - 2¹² = 16995193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16999289.

It is not an unprimeable number, because it can be changed into a prime (16999219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180797 + ... + 180890.

It is an arithmetic number, because the mean of its divisors is an integer number (4340256).

Almost surely, 2^16999289 is an apocalyptic number.

It is an amenable number.

16999289 is a deficient number, since it is larger than the sum of its proper divisors (361735).

16999289 is an equidigital number, since it uses as much as digits as its factorization.

16999289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361734.

The product of its digits is 629856, while the sum is 53.

The square root of 16999289 is about 4123.0194033014. The cubic root of 16999289 is about 257.1245743468.

The spelling of 16999289 in words is "sixteen million, nine hundred ninety-nine thousand, two hundred eighty-nine".