16809983 has 4 divisors (see below), whose sum is σ = 16819608. Its totient is φ = 16800360.

The previous prime is 16809979. The next prime is 16809997. The reversal of 16809983 is 38990861.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16809983 - 2² = 16809979 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 (16809913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1373 + ... + 5958.

It is an arithmetic number, because the mean of its divisors is an integer number (4204902).

Almost surely, 2^16809983 is an apocalyptic number.

16809983 is a deficient number, since it is larger than the sum of its proper divisors (9625).

16809983 is an equidigital number, since it uses as much as digits as its factorization.

16809983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9624.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 16809983 is about 4099.9979268287. The cubic root of 16809983 is about 256.1665531977.

The spelling of 16809983 in words is "sixteen million, eight hundred nine thousand, nine hundred eighty-three".