16904691 has 6 divisors (see below), whose sum is σ = 24417900. Its totient is φ = 11269788.

The previous prime is 16904663. The next prime is 16904711. The reversal of 16904691 is 19640961.

It is not a de Polignac number, because 16904691 - 2¹¹ = 16902643 is a prime.

It is a super-3 number, since 3×16904691³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16904611) 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 5 ways as a sum of consecutive naturals, for example, 939141 + ... + 939158.

It is an arithmetic number, because the mean of its divisors is an integer number (4069650).

Almost surely, 2^16904691 is an apocalyptic number.

16904691 is a deficient number, since it is larger than the sum of its proper divisors (7513209).

16904691 is a wasteful number, since it uses less digits than its factorization.

16904691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878305 (or 1878302 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 16904691 is about 4111.5314664976. The cubic root of 16904691 is about 256.6467361447.

The spelling of 16904691 in words is "sixteen million, nine hundred four thousand, six hundred ninety-one".