16904971 has 4 divisors (see below), whose sum is σ = 17157352. Its totient is φ = 16652592.

The previous prime is 16904969. The next prime is 16904983. The reversal of 16904971 is 17940961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17940961 = 1489 ⋅12049.

It is a cyclic number.

It is not a de Polignac number, because 16904971 - 2¹ = 16904969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16904971.

It is not an unprimeable number, because it can be changed into a prime (16905971) 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, 126090 + ... + 126223.

It is an arithmetic number, because the mean of its divisors is an integer number (4289338).

Almost surely, 2^16904971 is an apocalyptic number.

16904971 is a deficient number, since it is larger than the sum of its proper divisors (252381).

16904971 is an equidigital number, since it uses as much as digits as its factorization.

16904971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252380.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 16904971 is about 4111.5655169290. The cubic root of 16904971 is about 256.6481531220.

The spelling of 16904971 in words is "sixteen million, nine hundred four thousand, nine hundred seventy-one".