16889999 has 4 divisors (see below), whose sum is σ = 19302864. Its totient is φ = 14477136.

The previous prime is 16889953. The next prime is 16890001. The reversal of 16889999 is 99998861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99998861 = 3517 ⋅28433.

It is a cyclic number.

It is not a de Polignac number, because 16889999 - 2¹² = 16885903 is a prime.

16889999 is a modest number, since divided by 9999 gives 1688 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16889099) 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 in 3 ways as a sum of consecutive naturals, for example, 1206422 + ... + 1206435.

It is an arithmetic number, because the mean of its divisors is an integer number (4825716).

Almost surely, 2^16889999 is an apocalyptic number.

16889999 is a deficient number, since it is larger than the sum of its proper divisors (2412865).

16889999 is an equidigital number, since it uses as much as digits as its factorization.

16889999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412864.

The product of its digits is 2519424, while the sum is 59.

The square root of 16889999 is about 4109.7443959448. The cubic root of 16889999 is about 256.5723633618.

The spelling of 16889999 in words is "sixteen million, eight hundred eighty-nine thousand, nine hundred ninety-nine".