16803971 has 4 divisors (see below), whose sum is σ = 16833672. Its totient is φ = 16774272.

The previous prime is 16803949. The next prime is 16803977. The reversal of 16803971 is 17930861.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16803971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16803977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13985 + ... + 15138.

It is an arithmetic number, because the mean of its divisors is an integer number (4208418).

Almost surely, 2^16803971 is an apocalyptic number.

16803971 is a deficient number, since it is larger than the sum of its proper divisors (29701).

16803971 is an equidigital number, since it uses as much as digits as its factorization.

16803971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29700.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 16803971 is about 4099.2646901609. The cubic root of 16803971 is about 256.1360106930.

The spelling of 16803971 in words is "sixteen million, eight hundred three thousand, nine hundred seventy-one".