16899691 has 4 divisors (see below), whose sum is σ = 16912584. Its totient is φ = 16886800.

The previous prime is 16899689. The next prime is 16899709. The reversal of 16899691 is 19699861.

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

It is a cyclic number.

It is not a de Polignac number, because 16899691 - 2¹ = 16899689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16899661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4225 + ... + 7186.

It is an arithmetic number, because the mean of its divisors is an integer number (4228146).

Almost surely, 2^16899691 is an apocalyptic number.

16899691 is a deficient number, since it is larger than the sum of its proper divisors (12893).

16899691 is a wasteful number, since it uses less digits than its factorization.

16899691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12892.

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

The square root of 16899691 is about 4110.9233755934. The cubic root of 16899691 is about 256.6214303441.

The spelling of 16899691 in words is "sixteen million, eight hundred ninety-nine thousand, six hundred ninety-one".