16699189 has 4 divisors (see below), whose sum is σ = 17983756. Its totient is φ = 15414624.

The previous prime is 16699141. The next prime is 16699211. The reversal of 16699189 is 98199661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8803089 + 7896100 = 2967^2 + 2810^2 .

It is a cyclic number.

It is not a de Polignac number, because 16699189 - 2¹³ = 16690997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16699139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642264 + ... + 642289.

It is an arithmetic number, because the mean of its divisors is an integer number (4495939).

Almost surely, 2^16699189 is an apocalyptic number.

It is an amenable number.

16699189 is a deficient number, since it is larger than the sum of its proper divisors (1284567).

16699189 is a wasteful number, since it uses less digits than its factorization.

16699189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284566.

The product of its digits is 209952, while the sum is 49.

The square root of 16699189 is about 4086.4641195048. The cubic root of 16699189 is about 255.6025173165.

The spelling of 16699189 in words is "sixteen million, six hundred ninety-nine thousand, one hundred eighty-nine".